a. fruit and shoot borer b. mealybug c. flea beetle d.

aphid
CROP PROTECTION 14. The most damaging insect pest of cabbage and other crucifers is
AGRICULTURE EXAMINATION REVIEW MATERIAL thediamond back moth, scientifically known as
REFERENCES: a. Myzus persicae b. Pieres rapae c. Plutella xylostella d. Spodoptera litura
UPLB REVIEW MATERIALS 15. The most important quarantine insect pest of mango
CLSU LEA REVIEWER a. fruit fly b. mango planthopper
DOSCST REVIEWER COLLECTION SET c. mealybug d. twig borer
16. The vector of virus diseases in banana
Entomology a. Pentalonia nigronervosa b. Erionota trax
1. The earliest known hexapod probably a Collembolan during the c. Cosmopolites sordidus d. Bactrocera dorsalis
middleDevonian of Scotland is 17. The following are advantages of biological control except
a. Rhyneilla praecursor b. Danaus plexippus a. safe b. self perpetuating
c. Limenitis archippus d. Spodoptera litura c. environment – friendly d. slow acting
2. The earliest known insect from the upper Devonian of Russia. 18. The major organ for circulating the hemolymph of insects
a. Eopterum devonicum b. Rhyneilla praecursor a. dorsal vessel b. heart c. ostia d.
c. Danaus plexippus d. Limenitis archippus aorta
3. In the classification ladder, genus are grouped into: 19. Ant lions, lace wings and aphid lions which are all predators belong toOrder
a. species b. class c. family a. Coleoptera b. Neuroptera c. Siphonaptera d.
d. order Strpesiptera
4. A tool that unlocks the door to identification of an unknown organism 20.Tabanus sp. the vector or Surra disease of carabao is under Order
a. key b. nomenclature c. systematics a. Hymenoptera b. Diptera c. Coleoptera
d. taxonomy d. Lepidoptera
5. A branch of science which deals with how organisms are related to 21. The following insect orders have species which are beneficial except one:
eachother and which attempts to describe the underlying reasons for a. Neuroptera b. Strepsiptera c. Dermaptera
thatrelationship d. Anoplura
a. Nomenclature b. Morphology c. Systematics 22. A part of the insect brain which controls the transmission of impulses toand
d. Taxonomy from the antennae
6. The other term for Class Insecta, which means “six-legged” is a. deutocerebrum b. tritocerebrum
a. Class Myriapoda b. Class Hexapoda c. Class Diplopoda c. protocerebrum d. supraesophageal ganglion
d. Class Hexagona 23. Leafhoppers and aphids have this type of mouthpart
7. The primitively wingless insects are under Subclass a. Chewing. b. Chewing lapping c. Piercing d. Piercing-sucking
a. Apterygota b. Pterygota c. Ametabola 24. Houseflies have this type of mouthparts
d. Holometabola a. Piercing-sucking b. Chewing-lapping c. Sponging d. Siphoning
8. Wingless insects appeared during the Silurian Period. In what 25. This structure protects the insects from outside forces includinginsecticides
geologicalperiod did winged insect species appear? a. exoskeleton b. antennae
a. Lower Carboniferous b. Devonian c .Cambrian c. basement membrane d. cuticle
d. Jurassic 26. These structures are the smallest branches of the tracheal system
9. He developed the binomial system of nomenclature a. trachea b. taenidia c. tracheoles
a. Fabricius b. Aristotle c. Linnaeus d. air sacs
d. Mueller 27. The body cavity of insects is
10. The acarologist who spearheaded research on mites in the Philippine a. haemolymph b. haemocoel c. hemoglobin d. plasma
a. F.F. Sanchez b. L.C. Rimando c. L.C. Raros 28. Insect feces are in form of dry pellets because of a certain limiting factor.
d. C R. Baltazar This factor is:
11. They are major insect pest of beans except a. moisture b. blood c. air d. sugar
a. black bean aphid b. podborer c. stink bug d. diamond back moth 29. Unlike the minor pests, key pest oftentimes pest population tends to
12. They are all important pests of citrus except gobeyond threshold level which significantly affects yield. All areconsidered
a. rind borer b. locust twig borer c. scale insect d. mealybug major pests except.
13. The most important insect pest of eggplant a. Stemborer in rice b. Asian corn borer in corn
c. Diamond-back moth in cabbage d. Black Bug in rice a. organophosphates b. botanicals c. IGRs d. microbial
30. Helicoverpa armigera armigera a polyphagous lepidopteran pest insecticides
iscommonly known as? 43. A modern approach to minimize damage by pests with the ultimate goal of
a. Tobacco budworm b. Cotton Bollworm population management rather than eradication
c. Corn Earwor d. all of the above a. Integrated Pesticide Management b. Integrated Pest Management
31. A kind of damage caused by the feeding of an insect through theremoval of c. Insect Pests Management d. Pesticide Management
plant sap or plant parts in contrast with the damage causedby disease- 44. A serious pest species that occurs perennially and regularly limits
transmitting insects. cropproductivity
a. indirect damage. b. direct damage a. occasional pest b. key pest c. potential pest d. destructive
c. damage indicator d. action threshold pest
32. The pest density at which artificial control measures should be appliedto 45. The use ofTetrastichus brontispae on brontispa-infested coconut trees
prevent pest population increase or pest outbreak iswhat type of control strategy?
a. economic injury level b. equilibrium level a. mechanical control b. cultural control
c. economic threshold level d. satiation level c. biological control d. autocidal control
33. An insect which carries and transmits a disease causing organism to aplant 46. The term given for crop destruction, injury or loss of value caused by
a. predator b. parasite c. vector d. symbionts thefeeding activity of different pests
34. A biological control agent that consumes many preys in its lifetime a. characteristic damage b. pest infestation
a. parasite b. vector c. predator d. symbiont c. threshold d. damage indicator
35. A pest that occurs at infrequent intervals and causes economic damageonly 47. Insect pests of rice which are vectors of virus diseases except
at a certain time and place. a. brown plant hopper b. green leafhopper
a. occasional pest b. key pest c. chronic pest d. potential pest c. rice stemborer d. zigzag leafhopper
36. A kind of pest that has no significant damage under 48. All are major insect pests of rice except
prevailingagroecosystem but might bring about damage with a change in a. black bugs b. leafhoppers c. pod borer d. stemborers
cropand cultural practices 49. They are important insect pests of corn except
a. occasional pest b. key pest c. potential pest d. chronic a. armyworm b. cutworm c. corn seedling maggot d. black
pest bug
37. The relative amount of heritable qualities in plants that influence theultimate 50. Popular hymenopterous parasitoid as biocon agent of corn borer eggs
degree of damage by the pest a.Apantelessp. b.Ichneumonid wasp
a. host plant resistance b. insecticide resistance c. Sceliosp. d.Trichogramma evanescens
c. tolerance d. antibiosis A farmer obtained the following data during the calibration of his 16
38. A cultural practice against pest utilized to enhance the activities andsurvival litersknapsack sprayer:Spray swath-2 metersDistance travelled -50
of natural enemies metersVolume-2 liters per minute
a. trap crops b. biological control 51. The application rate per hectare is:
c. habitat diversification d. cultivation a. 100 liters/hectare b. 150 liters/hectare
39. The use of a piece of GI sheet installed around a coconut tree is a c. 200 liters/hectare d. 250 liters/hectare
_____method used against rodents. 52. The number of sprayer loads per hectare is:
a. cultural control b. chemical control a. 12.5 b. 13.5 c. 14.5 d. 15.5
c. physical control d. mechanical control 53. The number of hours to spray one hectare
40. Early harvest using machine is a _______ type of control against pests a. 1.25 hours b. 1.66 hours c. 2.08 hours d. 3.0 hours
a. cultural control b. chemical control 54. The area in hectare covered by the farmer during his calibration is
c. physical control d. mechanical control a. 0.10 ha. b. 0.01 ha. c. 0.02 ha. d. 0.20 ha.
41. Water management can be categorized under all methods of control During calibration, a farmer walked a distance of 42 meters in oneminute using
except: a sprayer with spray swath of 2.5 meters.
a. cultural b. chemical control c. physical control d. mechanical 55. What is the area in hectare covered by the farmer in one hour?
control a. 0.63 hectare b. 0.73 hectare c. 0.83 hectare d. 0.93
42. This group of insecticides, in a way, could be considered a biologicalcontrol hectare
method 56. How long will it take for the farmer to spray two hectares?
a. 1.23 hours b. 1.58 hours c. 3.17 hours d. 5.47 hours
Mr. dela Cruz calibrated his 16 liters knapsack sprayer and sprayed the 100 c. Both A & B d. None of the above
m2area in one minute with 1.5 liter volume of water. 72. Known as insect vectors of viruses causing tungro disease
57. What is the volume of spray solution per hectare? a. Nephotettix virescens b. Nilaparvata lugens
a. 100 liters/hectare b. 150 liters/hectare c. Hydrellia philippina d. Leptocorisa oratorius
c. 200 liters/hectare d. 250 liters/hectare 73.________is caused by penetration of insecticide through the skin. It
58. What is the number of tank loads per hectare? isprobably the major route of occupational exposure to pesticides
a. 9.3 b. 12.5 c. 15.6 d. 16.35 a. dermal poisoning b. food poisoning
9. What is the time to spray one hectare c. inhalation poisoning d. oral poisoning
a. 100 minutes b. 150 minutes c. 200 minutes d. 250 74. Refers to the length of time required before entering a field after spraying
minutes a. Entry Period b. Exit Period c. Observation Period d. Re-
60. How long will it take to spray two hectares? entry Period
a. 1.33 hr. b. 1.66 hr. c. 2.50 hr. d. 3.33 hr. 75. The length of time that must elapse before a crop can be
61. The scientific name of rice stem borer is harvestedfollowing treatment with a pesticide
a. Scirpophaga innotata b. Helicoverpa armigera a. Post-harvest restriction b. Pre-Harvest restriction
c. Ostrinia furnacalis d. Thrips tabaci c. Mid-harvest restriction d. Harvest restriction
62. A substance in a product which is responsible of killing the targetorganisms 76. Setaceous type of antennae is bristle-like in which the segmentsbecomes
a. inert ingredient b. active ingredient c. insecticide d. more slender distally. Which of the choices below possess asetaceous type of
pesticide antennae?
63. A chemical substance which is produced by one organism whichinfluence a. antsb. dragonfly c. male mosquito d. click beetle
the behavior of the other members of the same species 77. What type of antennae June beetle possessed?
a. sex pheromones b. pheromones a. Lamellate b. Aristate c. Clavate d. Moniliform
c. hormones d. aggregate pheromones 78. A very destructive coleopteran pest of sweet potato which feeds on
64. The year when rice black bug outbreak was recorded in Zamboanga tubersand vines and renders the tubers unmarketable and unfit for human
whichdamaged 2, 070 ha or rice crop andanimal consumption
a. 1979 b. 1982 c. 1992 d. 1996 a. Cylas formicarius b. Nilaparvata lugens
65. An aphid species which transmits many mosaic viruses especially c. Cylas tuberosum d. Gryllotalpa Africana
inlegumes 79. In caterpillars, the pseudolegs are found on the
a. Aphis craccivora b. Myzus persicae a. thorax b. abdomen c. thorax and abdomen d.
c. Aphis gossypii d. Toxoptera aurantii cephalothorax
66. The scientific name of citrus rind borer is 80. Which of the following is used to enclose the stylets or needles inpiercing-
a. Idioscopus clypealis b. Monogatus puntiferalis sucking mouthparts?
c. Prays endolemma d. Pentalonia nigronirvosa a. labium b. hypopharynx c. maxilla d. labrum
67. The first pair of wings among the beetles characterized ashard/sclerotized 81. The part of the antennae containing several segments
and used to protect the hindwings a. scape b. pedicel c. flagellum d. Johnston
a. Tegmina b. Elytra c. Hemelyta d. Fringed segment
68. The segment of the insects’ antennae that nearly always contain a sensory 82. The compound eyes of insects are composed of smaller units called
organ is known as the a. ocelli b. ommatidia c.tympanum d. eye patch
a. Clavola b. Scape c. Pedicel d. Flagellum 83. The type of antennae of termites and some beetles is
69. The ants, bees, wasps and sawflies belong to the order a. moniliform b. filiform c. setaceous d. aristate
a. Diptera b. Hymenoptera c. Coleoptera d. Lepidoptera 84. Butterflies and moths have this type of metamorphosis
70. The insect pest commonly known as corn earworm, tomato a. holometabolous b. hemimetabolous
fruitworm,tobacco budworm, cotton bollworm and sorghum headworm c. paurometabolous d. ametabolous
isscientifically known as 85. Bugs, cidadas, leafhoppers, aphids and scale insects have this type
a. Ostrinia furnacalis b. Leucinodes orbonalis ofmetamorphosis
c. Helicoverpa armigera armigera d. Spodotera litura a. holometabolous b. hemimetabolous
71. Any insect which annoys, injures or damages man directly and indirectly c. paurometabolous d. ametabolous
iscalled 86. Insects breathe througha. mouthpartsb. antennaec. spiraclesd. air tubes87.
a. Insect pest b. Entomophagous insect The following are parts of the alimentary canal except one
a. Malphigian tubules b. tympanum c. stomodauem 102. Which of these insect orders was derived from a Latin word which
d. rectum means“lasting a day” or short-lived wings”?
88. Insects that have one generation per year a. Odonata b. Ephemeroptera c. Thysanoptera d.
a. polyvoltine b. bivoltine c. univoltine d. Homoptera
multivoltine 103. Based on color code the category 1 of pesticides means.
89. In the chewing type of mouthparts, this structure cuts and grinds thefood a. extremely toxic b. highly toxic c. moderately toxic d.
a. labrum b. labium c. maxillae d. mandible relatively harmless
90. The system in insects which consists of hardened sclerotized plates 104. When pest population reach the injury level, pesticide application isvital to
joinedtogether by thin unsclerotized strips and provides rigidity with flexibility have an immediate result. Pesticide comes with differentformulation. It could be
a. Digestive system b. Excretory system in a solid formulation, liquid or gasformulation. From the choices below which is
c. Integumentary system d. Muscular system not a non-solidformulation?
91. The predatory insect responsible in the suppression of the population of nules b. Pellets c. Dry floa. Grawables d. all of the above
the cottony cushion scale,Icerya purchasithis is the earliest recordedbiological 105. Parasitic wasp parasitizing the pupal stage of Brontispa longissimaan
control of an insect pest invasive pest of coconut.
a. Rodolia cardinalis b. Trichogramma evanescens a. Cotesia b. Tetrasticus c. Evania d. Brachymerius
c. Menochilus sexmaculatus d. Trichogramma chilonis 106. The factitious host used in rearing predatory beetles on squash
92. Armyworms and cutworms prefer to pupate in the soil while cacao a.Aspidiotus destructor b.Lepidosaphes ulmi
podborers pupate on c.Ceroplastes rubens d.Icerya purchase
a. soil b. leaves c. branches d. twigs 107. Which of the following is a phytophagous species of mites which
93. Responsible for the reduced uptake of insecticide solution by the infestsmany crops especially during long periods of drought?
insectintegument a. Telenomus triptus b. Tetranychus kanzawai
a. wax b. chitin c.sclerotin d. tannin c. Trichomma sp d. Phytoseilus similis
94. Head louse have this type of modified legs 108. Which of the following is a predatory mite species?
a. crawling b. clinging c. grasping d. digging a.Telenomus triptus b.Tetranychus kanzawai
95. Mole crickets with their legs modified for digging are c.Trichomma sp d. Phytoseilus similis
a. root feeders b. leaf feeders c. fruit borers d. plant 109. The pollinator weevil of oil palm is:
suckers a. Elaeidobius kamerunicus b. Elaeis gueneinsis
96. The coconut leaf beetle orBrontispa lonsgissimafeeds by c. Elaeidobius gueneinsis d. Rhynchophorus ferrugenius
a. sucking the sap b. chewing the leaf epidermis 110. A commonly used insect specimen in genetic
c. boring holes d. creating galls studies,Drosophilamelanogasteris under order
97. The coconut mealybug orNipaecoccos nipae feeds by a. Coleooptera b. Diptera c. Isoptera d. Hymenoptera
a. sucking the sap b. chewing the leaf epidermis 111. A repository of systematic collections and information is a:
c. boring holes d. creating galls a. gene bank b. germplasm collection
98. A mechanism of host plant resistance wherein if the insect feeds on c. research center d. museum
aresistant plant, there will be malformation of the immature stages of theinsect, 112. Insects are believed to have arisen from an ancestor that had pairedleglike
and eventually may cause death appendages on each body segment. Which of these is the possibleancestor of
a. antibiosis b. antixenosis c. non preference d. insects?
parthenogenesis a. Myriapod Ancestor b. Pauropod Ancestor
99. Which of the following insects is a serious pest of anthrurium? c. Diplopod Ancestor d. Arthropod Ancestor
a. stink bugs b. mole crickets c. thrips d. 113. The ladybug, a general predator of soft-bodied insects is not actually abug
grasshoppers but a beetle and belongs to order
100. The physical pest control method required to eliminate fruit flies onmango a. Hemiptera b. Isoptera c. Homoptera d. Coleoptera
and papaya for export to Japan 114. The basic unit of classification
a. Hot Water Treament b. Vapor Heat Treatment a. sibling species b. subspecies c. species d. biotype
c. Refrigeration d. UV Radiation 115. Of the insect leg structures, which is the most relevant inidentification?
101. A new generation insecticide which alters the growth of insects a. length of femur b. size of tibia
a. Insect Growth Regulator (IGR) b. Carbamates c. number of tarsal segments d. number of tarsal claws
c. Pyrethrin d. Green Labeled Insecticides
116. A cavity in the mesenteron in which enzyme production, absorptiontakes 132. Legal actions intended to exclude potential pests and preventspread of
place those already presenta. eradicationb. containmentc. suppressiond.
a. ventriculus b. proventriculus c. pyloric valve d. haemocoel quarantine133. The discovery of DDT on this year is considered as one of the
117. An insect pest was found in banana shipped to China. This majorevents in the history of crop protection
insectaccording to literature does not infest banana but infests coconut. This is a. 1959 b. 1937 c. 1935 d. 1939
a scale insect under Order Homoptera: Family Diaspididae. This has a piercing- 134. The insecticide is said to be extremely toxic if the color of thecontainer
sucking mouthpart and undergoes incompletemetamorphosis. It has a common label is:
name of “compere scale” and belongsto a group of scale insects generally a. blue b. red c. green d. yellow
termed as “armored scale insects”. This insect is scientifically known as 135. The type of insecticide highly compatible for IPM
a. Aspidiotus destructor b. Ferrisia virgata a. non selective insecticide b. fumigants
c. Aonidiella compere d. Cerataphis palmae c. selective insecticide d. persistent insecticide
118. A compound which has insecticidal effect derived from chrysanthemum is 136. Systemic insecticides are sprayed on crops and are translocated
a. rotenone b. nicotine c. pyrethrum d. azadirachtin todifferent plant parts. When insects feed on these plant parts they getkilled.
119. A compound which has insecticidal effect derived from neem tree is Which of these is an example of a systemic insecticide?
a. rotenone b. nicotine c. pyrethrum d. azadirachtin a. Dipel b. Pennant 50 EC c. Furadan 3G d. Vegetox 50 SP
120. A compound which has insecticidal effect derived from fromDerris elliptica 137. All are damages produced by chewing insects except
a. rotenone b. nicotine c. pyrethrum d. azadirachtin a. entire leaf missing b. leaf mines
121. A biological control organism that usually lives inside the body of itshosts c. portion of leaf missing d. leaf curling
and consumes only one host to complete its life cycle 138. All are damages produced by sucking insects except
a. parasite b. predator c. prey d. pathogen a. galling b. puckering c. stippling d. skeletonized leaf
122. The symptom of stemborer damage during the reproductive stage ofthe 139. The point of entry of fumigant insecticide
rice plant characterized by the pale appearance of the unfilledgrains a. integument b. mouth c. spiracles d. tympanum
a. deadheart b. whitehead c. wilting d. mosaic 140. An example of organophosphorus insecticide
123. The symptom of yellowing and wilting of the youngest leaf as a resultof a. Defender b. Applaud c. Malathion d. Karate
feeding by the stemborer larvae during the vegetative stage of the riceplant 141. The following are characteristics of a parasitoid except
a. deadheart b. whitehead c. wilting d. rotting a. kills hosts gradually b. lives inside or outside the host
124. The growth stages of the rice plant that are most preferred by the ricebug c. bigger than its host d. requires one host to complete development
a. vegetative stage b. soft dough stage 142. The following are examples of cultural control methods except
c. milk stage d. both b and c a. crop rotation b. crop complementation
125. A serious pest of corn that attacks all parts of the plant except the roots c. fumigation d. sanitation
a. cutworm b. cornstalk borer c. corn semi looper d. corn borer 143. A mechanism of insect resistance that is described as refractory to guests
126. A Homopteran insect pest that transmits the tungro virus disease a. antibiosis b. antixenosis c. diagnosis d. tolerance
a. Brown planthopper b. whitebacked planthopper 144. The following are examples of synthetic pyrethroids insecticides except
c. green leafhopper d. zigzag leafhopper a. Karate b. Decis c. Cypermethrin d. Actara
127. Spodoptera liturais a pest of 145. The following are disadvantages of chemical control except :
a. onion b. corn c. both a and b d. neither a or b a. development of resistant pests species
128. Bractrocera dorsalisis a pest of a. eggplantb. watermelonc. mangod. b. hazards of pesticide residues
tomato129. IPM employs the variety of tactics, and the least type of method c.rapid curative action in preventing economic damage
thatcould be used is d. resurgence or outbreak of secondary pest
a. cultural control b. chemical control c. HPR d. autocidal 146. Contact, stomach and fumigant poisons are classification of
130. The regulatory method of insect control is closely related to: insecticidesbased on
a. cultural control b. quarantine control a. mode of action b. mode of entry
c. biological control d. physical control c. origin of the active ingredient d. selectivity
131. Eradication, quarantine, using certified planting materials 147. An example of an egg parasitoid
checkingsuspected materials before planting and cleaning equipment, a. Corcyra cephalonica b. Tetrastichus brontispae
areexamples of what type of management? c. Menochilus sexmaculatus d. Trichogramma chilonis
a. prevention b. protection c. eradication d. all of the above 148. Defined as the inherent ability of the crop to avoid or withstand
pestinfestation without consequent loss in yield
a. avoidance b. inheritance c. resistance d. tolerance 162. A specialized field of entomology dealing with species that are important
149. The insecticide that kills a wide array of insect pests species inbeneficial or injurious manner
a. broad spectrum b. narrow spectrum c. specific d. aerobic a. Economic Entomology b. Insect morphology
150. A type of resistance that is governed by environmental factors c. Insect ecology d. Insect physiology
a. ecological resistance b. genetic resistance 163. Insects can be distinguished from other arthropods by their:
c. vertical resistance d. horizontal resistance a. One or two pairs of wings, if any b. Three distinct body regions
151. The usual target site of the organophosphate insecticides c.Three pairs of legs d. All of the above
a. digestive system b. nervous system 164. Refers to the monetary value lost to the commodity such as reduction in
c. reproductive system d. respiratory system yield due to an insect pest
152. A control method which aims at modifying the crop environment tothe a.Injury b Damage c. Both A & B d. None of the above
effect that it becomes less favorable for the development of pestpopulation 165. The three main body regions of an insect include the
a. biological control b. cultural control a. Head, thorax and abdomen b. Head, thorax and epiproct
c. physical control d. chemical control c. Head, thortax and cerci d. Head, cephalothorax and abdomen
153. A control method which involves the manipulation of parasites, predators 166. Serve as excretory organs in insects
and pathogens to manage the density of insect population a. Malpighian tubules b. Rectum c. Rectal pads d. Colon
a. cultural control b. biological control 167. The thrips possess this particular type of mouthparts
c. mechanical control d. physical control a. Rasping-sucking b. Piercing-sucking
154. It is used for insect control by substituting a crop on which insect c. Chewing-lapping d. Sponging
cannotfeed or develop 168. All are parts of the insect leg except:
a. crop rotation b. crop diversification a. clavola b. femur c. tibia d. trochanter
c. crop fertilization d. trap cropping 169. All are wing coupling devices except one:
155. This group of insecticide is highly toxic to insects at very low rate a. arolium b. frenulum c. hamuli d. jugum
a. carbamates b. organophosphates 170. Type of insect wings in which 2/3 or ¼ of the forewings is parchment-like
c. pyrethroids d. chlorinated hydrocarbons while the remaining distal part is membranous
156. This group of insecticide has the advantage of being rapidly detoxifiedand a. elytron b. hemelytron c. humeral d. tegmen
the inhibition of cholinesterase is reversible 171. All are longitudinal veins of an insect wing except one:
a. carbamates b. pyrethroids a. Costa b. Media c. Radius d. Tarsus
c. organophosphorus d. chlorinated hyrocarbons 172. All have complete metamorphosis except one:
157. This type of cultural control reduces the favorability of the ecosystem a. cornborer b. diamond back moth
forinsect pest development by disrupting availability of food and habitat c. cacao podborer d. corn aphids
a. crop rotation b. sanitation c. fallowing d. strip harvesting 173. All have incomplete metamorphosis except one:
158. The Sterile Insect Release Method (SIRM) used in managing mangofruitfly a. mealybugs b. scale insects c. grasshoppers d. June
is an example of a. cultural control b. biological control beetle
c. genetic control d. chemical control 174. These are aquatic nymphs of insects with incomplete metamorphosis
159. The forelegs (sometimes called raptorial legs) of the preying a. naiads b. grubs c. larvae d. pupae
mantisadapted for grasping purposes is equipped with 175. Larvae of beetle particularly the species under Family Scarabaeidae
a. enlarged femur b. opposing spurs and spines arecalled:
c. hook-like structure d. flattened swimming legs a. maggots b. grubs c. wrigglers d. caterpillars
160. The stages of insects that undergo a holometabolous type 176. A butterfly pupa that lacks a protective cover is called:
ofmetamorphosis include the a. cocoon b. chrysalis c. cremaster d. puparium
a. egg, larva, pupa, adult b.egg, nymph, adult 177. A lobe-like eversible gland located at the dorsum of the thorax ofpapilionid
c. egg, naiad, adult d. egg, young, adult or swallowtail butterflie used as defense mechanism againstpredators is
161. Insects are important to man and agriculture because they: a. ommatidia b. osmeteria c. puparia d. ocelli
a. serve as vectors of the plant pathogens causing plant diseases 178. Egg capsule of cockroaches are called:
b. are sources of important products such as honey a. ootheca b. eggmas c. ova d. ovariole
c. serve as biological control agents 179. The change in form in insects during the post-embryonic development
d. all of the above a. ecdysis b. metamorphosis c. oviposition d.
sclerotization
180. The following stages of insects are able to feed except one: 195.The use ofBacillus thuringiensis(Bt) spores sprayed on lepidopterouslarvae
a. larva b. naiad c. nymph d. pupa is an example of
181. The rules that govern the naming of animals is embodied in the: a. cultural control b. biological control
a. International Code of Scientific Names c. physical control d. genetic control
b. International Code of Zoology 196. Chemicals applied to prevent damage by rendering the
c. International Code of Zoological Nomenclature commodityunattractive or offensive
d. International Code of Sytematics a. attractants b. repellents c. fumigants d. growth
182. The green leafhopper, the vector of a serious virus disease of rice – regulators
thetungro virus disease is under Order: 197. A kind of insecticide which kills the insects when ingested
a. Lepidoptera b. Hemiptera c. Homoptera d. Hymenoptera a. stomach poison b. contact poision
183. Which of these morphological characters is important inidentification? c. fumigants d. systemic poison
a. compound eyes b. genitalia c. abdominal sclerites d. tarsal 198. The most common and most useful insecticide formulation is
claw a. wettable powder b. emulsifiable concentrate
184. Which of these insects belong to Order Diptera? c. granular d. dust
a. mosquito b. butterfly c. damselfly d. firefly 199. The drying of rice plants due to sap removal caused by the feeding of
185. Which of these insects serve as bioindicator of the soundness of a planthoppers
certainecosystem? a. bugburn b. hopperburn c. deadheart d. whiteheads
a. dragonfly b. firefly c. mayflies d. sawfly 200. The ability of population of pests to survive doses of pesticides whichare
186. The character which differentiates Order Hemiptera from Homoptera normally lethal.
a. location of mouthparts and structure of wings a. biotypes b. resistance to pesticides
b. length of mouthparts and thickness of wingsc. orientation of mouthparts and c. host plant resistance d. resurgence
size of wings 201. There is a significantly more damage or more insects in an insecticide –
d. orientation of mouthparts and wing venation treated crop after insecticide application than in an untreated crop
187. A certain insect species may have several forms: some are winged, a. resistance to pesticide b. host plant resistance
othersare wingless, a male species may be shiny while the female is rough. c. resurgence d. biotypes
This phenomenon in Class Insecta is: 202. It is where all the legal information attached to the pesticide
a. metamorphosis b. parthenogenesis containerwhich should include the name of pesticide, manufacturers name,
c. polymorphism d. voltinism netcontent, ingredient statement, and warning statement, directions for useand
188. The slender hairlike structure of the cuticle formed by a antidotes foraccidental poisoning
plasmaticoutgrowth from a single epidermal cell a. trade name b. brand name c. label d. chemical
a. scale b. seta c. spur d. trichogen name
189. Appendages not found in the thorax 203. It is the measure of how poisonous a pesticide is to an animal or manafter
a . Legs b. wings c. legs and wings d. cerci small repeated doses over a period of time
190 . All of the following are mouthparts of an insect except a. toxicity b. acute toxicity c. chronic toxicity d.
a. labrum b. mandible c. maxilla d. tibia phytotoxicity
191. Which of these are density-independent mortality factors? 204. It is the measure of how poisonous a pesticide is to an animal or manafter
a. parasites b. predators c. food supply d. drought a single exposure
192. This insect is one of the factors for worldwide failure in cocoa production a. acute toxicity b. oral toxicity
a. Cacao Helopeltis Bug b. Cacao Pod Borer c. dermal toxicity d. chronic toxicity
c. Cacao Mealybug d. Thrips 205. It is the measure of how poisonous a pesticide is to living organisms
193. The endocrine gland of insects that secrete juvenile hormones andstore a. toxicity b. acute toxicity c. chronic toxicity d.
and release some brain hormones phytotoxicity
a.Corpus cardiacum b. Corpus allatum 206. It is the form in which a pesticide is sold for use
c. Deutocerebrum d. Protocerebrum a. liquid formulation b. solid formulation
194. These are insects which are residents in the shelters or nests of c. emulsifiable concentrate d. formulation
otherinsects 207. All of the following are types of antennae except one:
a.symbionts b. inquilines c. synergists d. mutualists a. aristate b. hamuli c. moniliform d. plumose
208. A type of insecticide which is translocated in the plant system and 225. If insecticide X contains the active ingredient of Imidacloprid at 300g/liof
insectsthatfeed on plant parts are poisoned the formulated product, what percentage of the product is its activeingredient?
a. Systemic insecticides c. Contact insecticides a. 0.3 b. 3 c. 30 d. 300
b. Fumigants d. Stomach poisons 226. During severe corn borer infestation, Furadan 3G should be appliedat 33.3
209. Entomopathogenic fungi must enter through the ________ of insectsto be kg/ha. How much of the product will be applied per plant atdensity of 60, 000
effective biological control agents: plants per hectare?
a. mouth b. cuticle c. anus d. spiracles a. 0.56g b. 0.66g c. 0.76g d. 0.86g
210. Entomopathogenic bacteria and viruses enters through the ________of 227. How much of Confidor SL 100 is needed to prepare 3, 000 liters if
insects in order to be effective biological control agents: thedilution rate is 50 ml/100 liters of water?
a. mouth b. cuticle c. anus d. spiracles a. 150 ml b. 1,500 ml c. 3,000 ml d. 4,000 ml
211. All are modifications of clubbed antennae except 228. Sevin 50 WP will be applied at the rate of 1.0 kg a.i/ha, how
a. clavate b. capitate c. flabellate d. geniculate manykilograms is needed per hectare?
212. All of the following are external processes of the body wall except one: a. 1.0 kg b. 2.0 kg c. 5.0 kg d. 7.0 kg
a. quinones b. scales c. setae d. spurs 229. Insecticide Y has 2.5% active ingredient. Express the concentrationin
213. All are types of wings except one:a. elytrab. tegminac. hemelytrad. parts per million
hamuli214. All are wing accessories except one: a. 250 b. 2500 c. 25000 d. 250000
a. hamuli b. halteres c. frenulum d. furcula 230. Given the application rate of 200 g sevin 50 WP per 100 liter water,what is
215. All are found on the apex of the abdomen except one: the recommended rate of application in tablespoon per 16liters of water? (1tbsp
a. cornicles b. cerci c. jugum d. ovipositor = 10grams)
216. Type of insect mouthpart wherein the cranium is turned upward on a. 2.0 tbsp b. 3.2 tbsp c. 6.25 tbsp d. 12.5 tbsp
theneck so that the mouthparts are directed forward
a. hypognathous b. prognathous
c. opisthognathous d. hypergnathous Plant Pathology
217. Type of insect mouthparts which have mandibles and can chew 231. Serves as the foundation of science of Plant Pathology
foodmaterials a. Robigalia b. Germ Theory of Disease
a. haustellate b. mandibulate c. siphoning tube d. sucking c. Kochs postulate d. all of the above
type 232. He invented the compound microscope in 1590
218. All have haustellate mouthparts except one: .a. Leeuwenhoek b. Theophrastus
a. green leaf hoppers b. mealybugs c. weevils d. aphids c. Jansen brothers d. Hooke
219. All have chewing type of mouthparts except one:a. beetlesb. bugsc. 233 He wrote the first textbook in plant pathology “ The Diseases ofCultivated
cricketsd. weevils Plants, Their Causes and Their Prevention”
220. Among all insect orders, which order has the largest population? a. De Bary c. Pasteur b. Kuhn d. Theophrastus
a. Diptera b. Hymenoptera c. Coleoptera d. Hemiptera 234.He proved that the nucleic acid of virus particle is the infective
221. Juan dela Cruz wishes to apply Cypermethrin 5 EC (5% activeingredient) a. Beijerinck b. Davide c. Pasteur d. Gierer and Schramm
in his one hectare farm at the rate of 0.0125 kg a.i./ha, howmany liters of the 235. The discovery of bordeaux mixture by_________________ started workon
chemical formulation are required to treat the givenarea? chemical control of plant disease
a. 0.25 L b. 0.50 L c. 0.75 L d. 1.0 L a. Kuhn b. Pasteur c. Beijerinck d.Millardett
222. If Decis 2.5 EC will be applied at the rate of 0.50 L/ha (formulatedproduct) 236. Father of plant virology
what will be the amount of chemical to be placed per tankload using 16 liters a. Kuhn b. Pasteur c. Millardett d. Beijerinck
knapsack sprayer at 10 tank loads per hectare? 237. He demonstrated that fungi are the causes and not the results of plant
a. 25 ml b. 50 ml c. 31 ml d. 16 ml diseases
223. Furadan 3G will be applied at the rate of 0.5 kg a.i./ha. How manykg of the a. Kuhn b. Millardett c. Pasteur d. De Bary
product is needed for 2 hectares of corn to control corn borerinfestation? 238. Nematode was first observed by ___________________ as plant
a. 16.66 kg b. 30.33 kg c. 33.33 kg d. 66.64 kg pathogeninside wheat kernels in 1743
224. A 3.33 WP insecticide is required for the control of eggplant fruit borerin a a. Davide b. Lafont c. Pasteur d. Needham
2 hectare field. The recommended rate is 0.50 kg a.i./ha. What is theactive 239. The first to see the virus particle under an electron microscope in1939
ingredient of the insecticide? a. Beijerinck b. Lafont c. Kausche d. Bawden
a. 20% b. 30% c. 40% d. 50%
240. He confirmed that hart rot disease of coconut is caused by flage 260. Correct plant disease diagnosis is necessary for
llateprotozoa recommendingappropriate control measures and in plant disease survey
a. Bawden b. Vermeulen c. Davis d. Smith a. true b. false c. maybe d. uncertain
241. He published the book “ The Plant Disease Epidemic” 261. Diagnosis based on symptom alone is not a very reliable means
a. Davis b. Smith c. Teng d. Vanderplank ofidentifying a particular malady
242. The first dean of UP College of Agriculture a. true b. false c. maybe d. uncertain
a. Baker b. Robinson c. Copeland d. Ocfemia 262. Classification according to the type of pathogen that causes thedisease is
243. Dean of Filipino Plant Pathologists who studied abaca bunchy top preferred by many workers because of the etiologicalbasis
a. Robinson b. Reinking c. Ocfemia d. Davide a. true b. false c. maybe d. uncertain
244. The Philippine Phytopathological Society, an association of 263. Which of these is an obligate parasite?
plantpathologist was established in a. virus b. bacteria c. fungi d. all of the
a. 1953 b. 1973 c. 1983 d. 1963 above
245. Spiroplasma which caused the stunt disease of corn was observed by 264. Which of these causes Injury?
Davis and co-worker in a. virus b. nematode c. lightning d. temperature
a. 1975 b. 1976 c. 1970 d. 1972 265. Which of these are diseases of field crops?
246. According to _______________, disease is a physiologicalmalfunctioning a. downy mildew of corn b. rice blast
caused by animate agents c. sugarcane smut d. all of the above
a. Stakman b. Harrar c. Whetzel d. Dimond 266. The non-parasitic agents of disease cause non-infectious or
247. Tolerance is exhibited by a plant which is severely affected by apathogen physiologicaldisorder which are recognized by their symptoms
without expressing a severe reduction in a. true b. false c. maybe d. uncertain
a. height b. growth c. yield d. all of the above 267. Chilling injury occurs below temperatures that are slightly above freezing
248. Disease development requires the presence of a. true b. false c. maybe d. uncertain
a. susceptible plants b. virulent pathogen 268. The black heart disease of potato occurs when oxygen is insufficient
c. favorable environment d. all of the above a. true b. false c. maybe d. uncertain
249. Different pathogens may cause the formation of identical symptoms 269. Scorching and sun scalding are two diseases caused by too much
a. true b. false c. maybe d. uncertain lightalong with high temperature
250. Most parasites are pathogens a. true b. false c. maybe d.uncertain
a. true b. false c. maybe d. uncertain 270. Which of these are pollutant particulates?
251. All are examples of hypoplastic symptoms except a. dust b. ash c. soot d. all of the above
a. mosaic b. stunting c. mottle d. gall 271. A concentration of 0.035 ppm for four hours may cause ozone injury in
252. All are examples of hyperplastic symptoms except sensitive plants
a. scab b. greening c. galling d. rosetting a. true b. false c. maybe d. uncertain
253. Symptoms are generally classified into 272. Foliocellosis of citrus is a disease due to deficiency in
a. necrotic b. hyperplastic c. hypoplastic d. all of the above a. zinc b. magnesium c. phosphorus d. sulfur
254. The flow of sap from wounds is called 273. Pineapple yellow disease occurs when the plant is deficient in
a. bleeding b. gummosis c. leak d. all of the above a. nitrogen b. potassium c. phosphorus d. iron
255. Yellowing of normally green tissues caused by inadequate light is 274. When cereal leaves take reddish purplish tints, the plant is deficient in
a. etiolation b. chlorosis c. spot d. blight a. nitrogen b. phosphorus c. potassium d. magnesium
256. Drying backward from the twigs or branches is called 275. Club root of crucifer is very severe at pH 6-7 and virtually controlled atpH
a. damping-off b. die-back c. wilting d. all of the above 7-8
257. An infected fruit converted to a hard, dry, shriveled mummy is called a. true b. false c. maybe d. uncertain
a. curling b. pitting c. mummification d. all of the 276. Potato scab is severe from pH 5.2 to 8.0 but is controlled below pH 5.2
above2 a. true b. false c. maybe d. uncertain
258. Most signs are best seen and distinguished under a microscope 277. Juglone is a compound which is formed by black walnut and is toxic
a. true b. false c. maybe d. uncertain toplants such as
259. All are examples of signs except a. potato b. tomato c. apple d. all of the above
a. spores b. bacterial ooze c. mycelia d. callus 278. Pesticide injuries to plants result from
a. application of excessively high concentration of chemical
b. vapor drift to sensitive plants 299. It is generally used to isolate nematodes
c. incorrect methods of pesticide application a. streak plate b. tissue planting
d. all of the above c. baerman funnel d. all of the above
279. Irregular water supply in tomato can cause 300. The smallest plant pathogen that is
a. blackheart b. blossom end rot c. soft rot d. dry rot a. mycoplasma b. rickettsia c. protozoa d. viroid
280. Potassium deficiency in cotton is exhibited by 301. Vascular streak die-back of _________________ is caused
a. cotton anthracnose b. cotton wilt byOncobasidium theobromae
c. cotton rust d. cotton leaf blight a. guava b. rubber c. cacao d. citrus
281. Nitrogen deficiency is exhibited by 302. Tarspot caused byPhyllachora sorghi is a disease of
a. chlorosis b. dwarfing c. premature defoliation d. all of the a. sorghum b. sugarcane c. corn d. rice
above 303. Fruit bronzing caused byPantoea stewartii is a new disease of
282. Pleomorphic microorganism without cell wall a. citrus b. banana c. papaya d. jackfruit
a. fungi b. mycoplasma c. virus d. viroid 304. Twig blight caused byHaematonectria haematoccoca is a new diseaseof
283. Mycelial-spore forming organism a. rubber b. cacao c. citrus d. durian
a. mycoplasm b. rickettsia c. fungi d. all of the above 305. “Bunga ng tubo” is a disease of sugarcane caused by
284. Flagellate primitive animals causing plant diseases a. fungi b. bacteria c. nematode d.parasitic flowering
a. pseudofungi b. protozoa c. fungi d. all of the above plants
285. Cause of root knot 306. The new epidemic on Panama wilt of banana and abaca caused by
a. nematode b. bacteria c. fungi d. viroid Fusarium oxysporum is under tropical race
286. Virus is made up of a protein coat and nucleic acid core a. 1 b. 2 c. 3 d.4
a. true b. false c. may be d. uncertain 307. The new blight disease of rubber with fishbone symptoms is caused by
287. Bacteria are unicellular and reproduce by binary fission a. Corynespora heveae b.Cercospora musae
a. true b. false c. maybe d. uncertain c.Cercospora manihotis d. Corynespora cassicola
288. Viroids is a pathogenic naked RNA entities 308. Orange gall caused by Synchytrium psophocarpiis a fungal diseaseof
a. true b. false c. maybe d. uncertain a. mungbean b. soybean c. peanut d.winged bean
289. Obtain only water and minerals from the host 309. If rice tungro is infected with RTBV and RTSV the symptom is
a. hemiparasitic b. endoparasitic a. light b. moderate c. trace d. severe
c. parasitic d. all of the above 310. Cherelle wilt caused byColletotrichum gloeosporioides is a fungal disease
290. Nematodes feeding only on root hairs and root tips of
a. ectoparasites b. semi-ectoparasites a. jackfruit b. papaya c. citrus d. cacao
c. endoparasites d. all of the above 311. It determines the germination and spread of the inoculum
291. Galling of tomato is caused by a. wind b. moisture c. soil type & pH d. nutrition
a. virus b. bacteria c. nematode d. fungi 312. Fungal sub-species that has no apparent morphological difference
292. Plants infected with _____________ have masked symptomsa. fungi b. fromother similar sub-species but differs in host range is called
virus c. viroid d. mycoplasma a. forma specials b. Pathovar
293. Cause downy mildew of many crops c. biovar d. cultivar
a. Virus b. fungi c. bacteria d. viroid 313. Pathogenicity refers to the ability of the pathogen to cause
294. Canker lesion in citrus leaves and fruits is caused by a. disease b. resistance c. susceptibility d. tolerance
a. fungi b. bacteria c. virus d. nematodes 314. Signs of plant disease refer to the structures of the pathogens that
395. Spindle tuber in potato is caused by arefound associated with the
a. virus b.viroid c. fungi d. bacteria a. disease b. organism c. saprophyte d. alternate host
296. Serological test is used to determine whether two or more viruses 315. The time over which the pathogen fruiting body or lesion continuesto
arerelated produce new inoculum
a. true b. false c. maybe d. uncertain a. incubation period b. infectious period
297. Viruses are usually spread in the field by c. dormant period d. latent period
a. nematode b. fungi c. insects d. birds 316. Plant disease is the malfunctioning of host cells and tissues that resultfrom
298. The majority of plant diseases are caused by continuous irritation by a pathogenic agent or environmental factorleading to
a. bacteria b. fungi c. virus d. nematode the development of
a. symptoms b. signs a. Incubation period b. Infectious period
c. abnormal physiology of plants d. all of the above c. Dormant period d. Latent period
317. Inoculum refers to a pathogen or part of the pathogen that can initiate 332. Tolerance refers to the ability of some plants to endure severe
a. infection b. dissemination diseasesymptoms without severe losses in yield or quality.
c. inoculation d. colonization a. False b. True c. A and B d. Maybe
318. The physical factors that affect the growth, sporulation and developmentof 333. Catechol and protocatechuic acid are an examples of
all living organisms a. glycosides b. alkaloids c. phenolic compounds d. toxin
a. temperature and moisture b. moisture and wind 334. Example of viroid-caused disease.
c. moisture and light d. temperature and wind a. Potato spindle tuber b. Bunchy top of abaca
319. This is responsible for widespread distribution of inoculum: c. Rice grassy stunt d. Rice tungro
a. wind b. moisture c. soil type d. nutrition 335. Known as needle nematode
320. Alternate hosts are plants on which some pathogens must develop a.Criconema b.Trichodorus
tocomplete its c.Helicotylenchus d.Longidorous
a. life cycle b. infection cycle 336. Burrowing nematode of banana
c. disease cycle d. secondary cycle a.Radopholus b.Tylenchus
321. Facultative parasite is an organism that can be parasite underappropriate c.Ditylenchus d.Xiphinema
conditions but it is primarily a saprophyte 337. Consider as "Father of Plant Pathology"
a. true b. false c. A and B d. maybe a. Kuhn b. Theophrastus
322. Symbiosis is the living together of different c. Robigo d. Millardett
a. pathogens b. organisms c. disease d. parasites 338. A specific chemical intended for molds
323. Infection occurs when the pathogen becomes associated with the cellsand a. Herbicide b. Fungicide
tissues of the c. Insecticide d. Acaricide
a. host b. resistant host c. immune host d. susceptible 339. Which is not considered among the five major genera ofphytopathogenic
host bacteria?
324. The time between initial penetration of the host and appearance a. Bacterium b. Xanthomonas
ofsymptoms c. Pseudomonas d. Erwinia
a. incubation period b. infectious period 340. A combination of copper sulfate and lime which was the foundation of
c. dormant period d. latent period chemical fungicides
325. In case a disease is not known to you previously, it is necessary toresort a. Saline solution b. Bordeaux mixture
to c. Benomyl d. Copper fungicide
a. Koch’s postulate b. Laboratory diagnosis 341. Correct disease diagnosis is a prerequisite to
c. Field diagnosis d. All of the above a. Classification of plant disease b. Formulation of control measures
326. An obligate parasite can grow only in association with a c. Disease incidence d. Disease development
a. non-living host b. resistant host 342. One of the first plant diseases studied in the Philippines
c. susceptible host d. living host a. Coconut bud rot b. Downy mildew of corn
327. Its quality, intensity and duration affect the growth of both host and c. Bunchy top of banana d. Rice tungro
thepathogen 343. All of the following are diseases caused by a virus except
a. wind b. moisture c. light d. nutrition a. Tobacco mosaic b. Citrus exocortis
338. External and internal reactions or alterations of a plant as a resultof a c. Abaca bunchy top d. Cadang-cadang of coconut
disease 344. A nutrient needed by bacteria in small amount
a. symptom b. sign c. invasion d. colonization a. carbon b. manganese c. nitrogen d. phosphorus
329. Disease identification in plants is called plant disease diagnosis 345. Downy mildew of corn was completely controlled in 1978 by
a. true b. false c. maybe d. uncertain a. chemical seed treatment b. manipulation of planting materials
330. Knowing the distribution of the disease in the field is part of thelaboratory c. burning d. roguing
diagnosis 346. A type of symptom involving the death of protoplasts, cells or tissues
a. true b. false c. maybe d. uncertain a. morphological b. necrotic c. primary d. systemic
331. The time between initial penetration of the host and the production of new 347. The cause of potato late blight in Ireland in 1840’s
inocula a. Plasmopara viticola b. Phytophthora infestans
c. Phytophthora palmivora d. Claviceps purpurea a. Pathogenesis b. Saprogenesis
348. A symptom characterized by a sharply defined variegated pattern c. Pathogen cycle d. Disease cycle
a. mottle b. chlorosis c. mosaic d. etiolation 368. Stage of pathogenesis that involves the transfer of inocula from sourceinto
349. Which of the following is not included in KOCH’s Postulate? the infection court
a. isolation b. association a. incubation b. colonization
c.inoculation d. colonization c. penetration d. inoculation
350. A fungal disease of rice which caused the Bengal famine in 1943 369. All of the following contributes to plant disease development except
a. rice blast b. brown spot of rice a. favorable environment b. virulent pathogen
c. panicle blight of rice d. sheath blight of rice c. resistant host d. susceptible host
351. The only plant pathogen belonging to the Animal Kingdom 370. The most important group of vectors of plant viruses both in termsof the
a. nematodes b. aphids c. fungi d.earthworms number of viruses they transmit and the economic importance of the disease
352. Color band of the least toxic pesticides these viruses cause
a. blue b. red c. green d. yellow a. green leafhoppers b. aphids
553. Sigatoka is a fungal disease of c. beetles d. whiteflies
a. mango b. banana c. citrus d. durian 371. The early works on plant disease due to viruses were based on thesimple
354. A fungal pathogen which destroyed the coffee industry in Batangas fact that they are
a. Puccinia arachidis b.Phytophthora palmivora a. very infectious and cause mosaic symptom
c. Uromyces phaseoli d. Hemeleia vastatrix b. very infectious and very small
355. The fungus which produces aflatoxin as it grows in stored grains,copra, c. are transmitted by aphids
etc. d. associated with leafhoppers
a. Aspergillus flavus b. Fusarium moniliforme 372. Viruses spread in the plant through slow cell to cell movement in the
c. Fusarium graminearum d. Aspergillus nidulans a. stomata b. xylem c. phloem d. plasmodesmata
356. Anthracnose is a major fungal disease of 373. Which of the following viruses would most likely survive?
a. mango b. peanut c. coconut d. durian a. a virus that kills its host plants with a rapidly developingsystemic disease
357. A common medium for the isolation of fungi b. a virus that causes only mild or moderate disease that allows theplant to
a. PDPA b. TZCA c. PDA d.Wakimoto’s survive
medium c. a virus that will not infect and cause any disease
358. A common isolation method of bacterial pathogens from plant tissues d. a virus that does not replicate in plants
a. tissue planting b. staining c. streaking d. baiting 374. Group of microorganisms that can directly penetrate the intact
359. The causal agent of bugtok and moko wilt of banana hostsurface
a. Fusarium oxysporum b. Pectobacterium carotovorum a. fungi b. bacteria c. virus d. viroids
c. Ralstonia solanacearum d. Xanthomonas campestris 375. A stage in the bacterial growth phase characterized by the
360. A common symptom of disease caused by fungi exponentialincrease in cell population
a. spot b. wilt c. replacement of host tissue d. rot a. lag phase b. stationary phase
361. A group of substances secreted by pathogens that interfere with c. logarithmic phase d. death phase
thepermeability of protoplast 376. Which of the following is a form of susceptible response by the plantto a
a. toxins b. enzymes c. growth regulator d. suppressors virus infection?
362. The basic unit of bacterial classification a. production of local lesions
a. kingdom b. genus c. family d. species b. relatively fast appearance of severe symptoms
363. Natural openings in the stem and root surface c. slow virus multiplication and spread
a. stomates b. lenticels c. hydathodes d. nectarines d. slow appearance of symptoms
364. The shape of most plant pathogenic bacteria 377. Bacteria devoid of cell wall
a. spherical b. rod c. helical d. Filamentous a. mollicutes b. bacillus c. streptomyces d. firmicutes
365. A group of pathogen species that infect a set of differential varieties 378. The physical properties of the virus includes
a. species b. race c. pathovar d. biovar a. thermal inactivation point b. dilution end point
366. Known as the Father of Plant Pathology c. longevity in vitro d. all of the above
a. Ocfemia b. De Bary c. Beijerinck d. Pasteur 379. What is heterokaryosis?
367. The sequence of events that give rise to disease a. parasexuality b. variation
c. conjugation d. presence of different nuclei in the same 396. The permanent nurse cells induced by root knot nematodes in rootsare
mycelium called
380. The primary reproductive structures of fungi a. galls b. syncytia c. giant cells d. nodules
a. spores b. mycelium c. sclerotial bodies d. hyphae 387. Which of the following should not be considered when identifying a
381. Structures formed by some pathogens in obtaining nutrients from thehost plantvirus?
a. infection peg b. germ tube a. genomic organization b. type of nucleic acid
c. appressorium d. haustorium c. shape of particle d. organization of protein
382. Fungi in the Philippines reproduce mainly by forming 398. A general necrosis caused by the rapid growth and advance of thecausal
a. sexual spores b. asexual spores bacteria on the leaves and stems
c. endospores d. ascospores a. wilt b. blast c. blight d. rot
383. The cell characteristics of fungi 399. Overgrowth of the protoplast of adjacent living parenchymatous
a. prokaryotic b. eukaryotic cells,which protrude into xylem vessels through pits
c. hermaphrodite d. heterothallic a. gums b. abscission layers
384. The feeding organ of plant parasitic nematodes c. tyloses d. cork layers
a. mandible b. stylet c. lip d. teeth 400. Clustering of roots, flowers, fruits or twigs around a common focus
385. The major agents of spread of inoculum in the field a. hypertrophy b. epinasty
a. wind b. water c. insects d. infected living plants c. hyperplasia d. fasciation
386. Mycelial growth occurs in the 401. Cellular respiration in bacteria occurs in the
a. hyphal tips b. hyphal base a. cell membrane b. chloroplast
c. hyphal division d. all of the above c. mitochondria d. ribosome
387. A type of disease cycle where only one generation occurs during 402. Bacterial motility is caused by a surface appendage called
thegrowing season a. cilia b. fimbriae c. flagella d. pili
a. polycyclic b. monocyclic c. a & b d. compound interest 403. Regulates the transport of materials into and out of the cell
388. Plant parasitic nematodes which move within the host tissues and/or a. cell wall b. cytoplasm c. cell membrane d. nucleus
between the soil and the host 404. The walls of fungi generally contain
a. sedentary endoparasites b. sedentary ectoparasites a. chitin b. glucan. c. chitin and glucan d. pectin
c. migratory endoparasites d. migratory ectoparasites 405. The most economically important disease of oil palm is the basal stemrot
389. Signs that do not indicate fungal infection caused by
a. mycelia tufts b. spores c. sclerotia d. gummosis a. Ganoderma boninense b. Marasmius sp
390. A fungus merely covering the surface of the plant without necessarily c. Curvularia sp d. Glomerellasp
parasitizing it 406. The art of Plant Pathology which determines the severity and prevalenceof
a. sooty mold b. slime mold diseases.
c. powdery mold d. grey mold a. disease assessment b. disease forecasting
391. The naming of newly discovered fungal species is based commonlyon c. disease monitoring d. disease diagnosis
a. location b. distinct structural character 407. Which of the following will not contribute to plant disease epidemics?
c. host d. well-known mycologist a. monocropping b. multicropping
392. The fungal inocula that initiate rust disease outbreak in the tropicsare the c. planting of susceptible hosts d. presence of active and mobile vectors
a. uredospores b. teliospores 408. A virus disease of rice which affected 70,000 hectares of rice fieldsin the
c. basidiospores d. ascospores Philippines in 1971.
393. For annual crops, the maximum number of nematode parasites can a. rice blast b. rice orange dwarf
berecovered during c. rice tungro d. brown spot of rice
a. fallow period b. vegetative stage 409. A disease of coffee which wiped out coffee plantations in Batangasin
c. flowering stage d. near harvest stage 1890.
394. The typical number of juvenile stages in the life cycle of a nematode is a. coffee leaf spot b. pink disease of coffee
a. 2 b. 3 c. 4 d. 5 c. coffee rust d. dieback of coffee
395. What is the common pattern of nematode spatial distribution in afield? 410. A disease of coconut which killed more than 15 million trees in
a. random b. patchy c. uniform d. none of these thePhilippines to date
a. bud rot of coconut b. gray leaf spot of coconut
c. cadang cadang of coconut d. leaf blight of coconut a. Aphids b. whiteflies c. Leafhopper d. planthopper
411. The pathogen may reduce the photosynthetic capacity of the susceptby 427. The following are examples of general elicitors of pathogen that
a. replacing the seed b. causing death of phloem vessels inducedefense response of the host except
c. destroying the chloroplast d. physically blocking the xylem vessels a. Elicitins b. flagellin c. Chitin oligomers d. glycoproteins
412. All of the following are effects of microbial toxins in the suscept except 428. Application of the following plant signal molecules to the plant oftenresults
a. changes in cell membrane in a higher level of resistance
b. stimulate enzymes a. Salicylic acid b. ethylene
c. physically block cell/ tissue system c. Jasmonic acid d. all answers are correct
d. stimulate abnormal growth 429. Systemic acquired resistance in plants is a secondary resistance pathogen
413. A science which deals with disease measurement is a. True b. not true c. maybe d. uncertain
a. Autoecology b. Epidemiology 430. A concept that explains the stepwise evolution of virulence andresistance
c. Pathometry d. Geophytopathology a. Pathogen concept b. gene-for-gene concept
414. The principle of plant disease control involved in controlling insectvectors c. Pathosystem concept d. all answers are correct
of pathogen is 431. If you want to control discuss in corn with the wettable fungicideBenomyl
a. protection b. immunization (Benlate 50 WP) and the recommendation rate of application is0.50 Kg ai/ha.
c. eradication d. exclusion The weight of Benlate (kg) needed per hectare is.
415. A control method which aims of modifying the crop environment to a. 0.5 kg b. 1.0 kg c. 10 kg d. 50 kg
theeffect that it becomes less favorable for the development of pest population. 432. A recommendation calls for 1g active ingredient of metalaxyl per kg.of
a. biological control b. cultural control corn seeds. If Apron 50 SD (formulated product) contains 50%metalaxyl, how
c. physical control d. chemical control much Apron 50 SD is needed to treat 100 kg sweetcorn seeds?
416. The following are methods and equipment used as new tools a. 200g b. 100g c. 20g d. 2 g
inepidemiology except 433. If the recommended rate of fungicide is 1.0 Kg ai/ha., how much of a30%
a. forecasting b. geographic information system formulation in liters is needed to cover 1000m2?
c. molecular tools d. remote sensing a. 0.30 liters b. 0.32 liters c. 0.33 liters d. 0.35 liters
417. Toppling disease of banana is caused by 434. If Ridomil has an active ingredient of 40g/kg metalaxyl, the percentactive
a. fungi b. bacteria c. nematode d. virus ingredient is.
418. Stem bleeding of rubber is caused by the fungus a. 0.4% b. 4.0% c. 40% d. 400%
a. Corynespora cassiicola b. Botyodiplodia theobromae 435. If 3.0 kg WP fungicide is required for the control of rice blast in onehectare
c. Phytophthora palmivora d. Hemileia vastatrix rice field and the recommended rate is 1.50 kg ai/ha. What isthe % active
419. Most leaf diseases of oil palm could be addressed by proper plantnutrition ingredient of the fungicide?
a. true b. not true c. maybe d. uncertain a. 25% b. 50% c. 55% d. 60%
420. Stem and root rot of coffee seedlings is caused by the fungus 436. Fungicide Y has 3% active ingredient. Express the concentration
a. Pythium debaryanum b. Sclerotium rolfsii offungicide in parts per million.
c. Phytophthora infestans d. Fusarium oxysporum a. 300 b. 3000 c. 30, 000 d. 300, 000
421. Bacterial wilt of potato and tomato is caused by 437. If Benlate 50 WP is recommended for sheath blight control at the rate
a. Erwinia chrysanthemi b. Xanthomonas citri of100m2 per 100 liters of water, what is the concentration of the finished
c. Pectobacterium carotovorum d.Ralstonia solanacearum sprayin ppm?
422. The cause of tobacco mosaic a. 100 b. 1000 c. 10, 000 d. 100, 000
a. Fungus b. nematode c. Virus d. bacteria 438. Given the application rate of 100g Benlate 50 WP per 100 liter water,what
423. A model plant used in plant pathological studies is the recommended rate of application (tbsp) per 16 liters of water?
a. Arabidopsis thaliana b.Brassica pekinensis a. 1.6 b. 3 c. 16 d. 6
c. Oryza sativa d.Cocos nucifera 439. How much of Benlate 50 WP is needed to prepare 2000 liters of
424. Anthracnose is also a disease of other fruits like banana, avocadoetc. spraysolution if the dilution rate is 25g/100 liters of water?a. 5gb. 50gc. 500gd.
a.True b. not true c. maybe d. uncertain 5000g
425. Toxic metabolites released by fungi growing on grains, legumes andnuts. 440. Fungicide 247 ZC is to be applied at the rate of 60ml per 200L drum.What
a. Zearalenone b. fumonisin is the amount of fungicide to be mixed with water using 16 litersknapsack
c. Aflatoxin d. mycotoxin sprayer?
426. Tomato leaf curl Gemini virus is transmitted by a. 4.6 ml b. 4.8 ml c. 5.0 ml d. 5.8 ml
441. The science which deals with the nature, causes and control of plant 455. The only plant pathogen belonging to the Animal Kingdom
diseases a. nematodes b. aphids
a. Entomology b. Agronomy c. fungi d. earthworms
c. Plant Pathology d. Horticulture 456. Color band of the least toxic pesticides
442. A specific chemical intended for molds a. blue b. red
a. herbicide b. insecticide c. green d. yellow
c. fungicide d. acaricide 457. Sigatoka is a fungal disease of
443. The art of Plant Pathology which determines the severity and prevalence a. mango b. banana
of diseases c. citrus d. durian
a. disease assessment b. disease forecasting 458. A fungal pathogen which destroyed the coffee industry in Batangas
c. disease monitoring d. disease diagnosis a. Puccinia arachidis b. Phytophthora
444. A combination of copper sulfate and lime which was the foundation of palmivora
chemical fungicides c. Uromyces phaseoli d. Hemeleia vastatrix
a. saline solution b. Bordeaux mixture 459. The fungus which produces aflatoxin as it grows in stored grains, copra,
c. Benomyl d. Copper fungicide etc.
445. Correct disease diagnosis is a prerequisite to a. Aspergillus flavus b. Fusarium moniliforme
a. classification of plant diseases b. formulation of control measures c. Fusarium graminearum d. Aspergillus nidulans
c. disease incidence d. disease development 460. Anthracnose is a fungal disease of
446. One of the first plant diseases studied in the Philippines a. mango b. peanut
a. coconut bud rot b. downy mildew of corn c. coconut d. durian
c. bunchy top of banana d. rice tungro 461. A common medium for the isolation of fungi
447. All of the following are diseases caused by a virus except a. PDPA b. TZCA
a. tobacco mosaic b. citrus exocortis c. PDA d. Wakimoto’s medium
c. abaca bunchy top d. cadang cadang of 462. A common isolation method of bacterial pathogens from plant tissues
coconut a. tissue planting b. staining
448. The following are hypoplastic symptoms of disease except c. streaking d. baiting
a. gall b. curling 463. The causal agent of bugtok and moko wilt of banana
c. mosaic d. stunting a. Fusarium oxysporum
449. Downy mildew of corn was completely controlled in 1978 by b. Pectobacterium carotovorum sub sp.
a. chemical seed treatment b. manipulation of c. Ralstonia solanacearum
planting dates d. Xanthomonas campestris
c. burning d. roguing 464. A common symptom of disease caused by fungi
450. A type of symptom involving death of protoplasts, cells or tissues a. spot b. wilt
a. morphological b. necrotic c. replacement of host tissue d. rot
c. primary d. systemic 465. Demonstrated that fungi are the cause and not the result of plant diseases
451. The cause of potato late blight in Ireland in 1840s a. Kuhn b. Burril
a. Plasmopara viticola b. Phytophthora c. De Bary d. Pasteur
infestans 466. The basic unit of bacterial classification
c. Phytophthora palmivora d. Claviceps purpurea a. kingdom b. family
452. A symptom characterized by a sharply defined variegated pattern c. genus d. species
a. mottle b. chlorosis 467. Natural openings in the stem and root surface
c. mosaic d. etiolation a. stomates b. hydathodes
453. Which of the following is not included in KOCHs Postulate? c. lenticels d. nectaries
a. isolation b. association
c. inoculation d. colonization 468. The shape of most plant pathogenic bacteria
454. fungal disease of rice which caused the Bengal famine in 1943 a. spherical b. rod
a. rice blast b. brown spot of rice c. helical d. filamentous
c. panicle blight of rice d. sheath blight of rice 469. A group of pathogen species that infect a set of differential varieties
a. species b. race 481. The following are examples of commercially available control agents
c. pathovar d. biovar except
470. Known as the Father of Plant Pathology a. Bacillus thuringiensis b. Paecilomyces lilacinus
a. Ocfemia b. De Bary c. Metarrhizium anisopliae d. Rhizoctonia solani
c. Beijerinck d. Pasteur 482. A stage in the bacterial growth phase characterized by the exponential
471. The sequence of events that give rise to disease increase in cell population
a. pathogenesis b. saprogenesis a. lag phase b. stationary phase
c. pathogen cycle d. disease cycle c. logarithmic phase d. death phase
472. Stage of pathogenesis that involves the transfer of inoculum from source 483. Which of the following is a form of susceptible response by the plant to a
into the infection court virus infection?
a. incubation b. colonization a. production of local lesions
c. penetration d. inoculation b. relatively fast appearance of severe symptoms
473. All of the following contributes to plant disease development except c. slow virus multiplication and spread
a. favorable environment b. virulent pathogen d. slow appearance of symptoms
c. resistant host d. susceptible host 484. Bacteria devoid of cell wall
474. Which of the following will not contribute to plant disease epidemics? a. mollicutes b. bacillus
a. monocropping c. streptomyces d. firmicutes
b. multicropping 485. The following are examples of passive defense mechanisms of plants to
c. planting of susceptible hosts pathogen invasion except
d. presence of active and mobile vectors a. thick cuticle b. phytoalexins
475. The most important group of vectors of plant viruses both in terms of the c. presence of trichomes d. waxy layers
number of viruses they transmit and the economic importance of the 486. The causal organism of root knot of most vegetables
disease these viruses cause a. Meloidogyne incognita b. Radopholus similis
a. green leafhoppers b. aphids c. Plasmodiophara brassicae d. Agrobacterium tumefaciens
c. beetles d. whiteflies 487. What is heterokaryosis?
476. The early works on plant disease due to viruses were based on the simple a. parasexuality
fact that they are b. variation
a. very infectious and cause mosaic/mottle symptom c. conjugation
b. very infectious and very small d. presence of different nuclei in the same mycelium
c. are transmitted by aphids 488. The primary reproductive structures of fungi
d. associated with leafhoppers a. spores b. mycelium
477. Viruses spread in the plant through slow cell to cell movement in the c. sclerotial bodies d. hyphae
a. stomata b. xylem 489. Structures formed by some fungi in obtaining nutrients from the host
c. phloem d. plasmodesmata a. infection peg b. germ tube
478. Which of the following viruses would most likely to survive? c. appressorium d. haustorium
a. a virus that kills its host plants with a rapidly developing systemic disease 490. Fungi in the Philippines reproduce mainly by forming
b.a virus that causes only mild or moderate disease that allows the plant to a. sexual spores b. asexual spores
survive and reproduce effectively c. endospores d. ascospores
c. a virus that will not infect and cause any disease 491. The cell characteristics of fungi
d.a virus that does not replicate in plants a. prokaryotic b. eukaryotic
479. Group of microorganisms that can directly penetrate the intact host c. hermaphrodite d. heterothallic
surface 492. A group of substances secreted by pathogens that interfere with the
a. fungi b. bacteria permeability of protoplast
c. virus d. viroids a. toxins b. enzymes
480. The vector of rice tungro virus is commonly known as c. growth regulator d. suppressors
a. green leafhopper b. brown planthopper 493. A government agency that takes care of quarantine of pests
c. green planthopper d. brown leafhopper a. Bureau of Plant Industry (BPI)
b. Fertilizer and Pesticide Authority (FPA)
c. Department of Agriculture (DA) a. protection b. exclusion
d. International Rice Research Institute (IRRI) c. eradication d. immunization
494. The feeding organ of plant parasitic nematodes 506. Integrated pest management employs a variety of tactics and the least
a. mandible b. stylet method that could be used is
c. lip d. teeth a. biological method b. cultural method
495. The major agents of spread of inoculum in the field c. physical method d. chemical method
a. wind b. water 507. Considered as the most effective and economical method of plant disease
c. insects d. infected living plants control/management
496. Describes entrance of pathogens into the host a. cultural control b. biological control
a. active b. passive c. manipulation of planting dates d. planting of resistant varieties
c. a & b are correct d. neither a nor b is 508. Agromyl is a broad spectrum systemic fungicide which contains 500 g/kg
correct of Benomyl (formulated product). What is the concentration of Benomyl in parts
497. Growth of germ tube towards the host or substrate could be due to per million?
a. phototropism b. chemotropism a. 500 ppm b. 5,000 ppm
c. thigmotropism d. all of the above c. 50,000 ppm d. 500,000 ppm
498. Describes the usual effect of root rotting pathogen in plants 509. How much Agromyl 50 WP is needed to prepare 300 ml solution if the
a. changes reproduction of the host recommended rate is 2 tbsp per 16 liters water?
b. increases transpiration a. 0.375 g b. 3.75 g
c. interferes with the uptake of water and inorganic elements from the soil c. 37.5 g d. 0.0375 g
d. interferes with the translocation of organic compounds through the phloem
499. A type of disease cycle where only one generation occurs during the 510. In a bioefficacy test, 500 ppm of fungicide X is needed. If the chemical has
growing season 75% a.i, how much will be diluted into 250 ml water to attain the desired
a. polycyclic b. monocyclic concentration?
c. both a and b are correct d. compound interest a. 0.125 g b. 1.25 g
500. Due to massive use and misuse of systemic fungicides, several fungi have c. 12.5 g d. 0.0125 g
developed chemical resistance to 511. What is the concentration of the solution if Fungicide Y which is 50% EC
a. mancozeb b. metalaxyl requires 20 ml of the formulated product per 20 liters water.
c. chlorothalonil d. benomyl a. 0.05% b. 0.5%
501. In the bioassay of pesticides, concentrations of test solutions are usually c. 0.005% d. 0.0005%
expressed in 512. A recommendation calls for the application of Diagran 3G at 33.33 kg/ha
a. parts per million (ppm) b. percent (%) actual product. How much of the product is needed for 15,000 sqm in case of
c. gram (g) d. milliliter (ml) severe nematode infestation?
502. Plant parasitic nematodes which move within the host tissues and/or a. 0.4995 kg b. 49.995 kg
between the soil and the host c. 4.995 kg d. 499.5 kg
a. sedentary endoparasites b. sedentary 513. At the application rate of 33.33 kg/ha of Diagran 3G, find out how many
ectoparasites grams will be applied per plant if there are 500 banana plants?
c. migratory endoparasites d. migratory ectoparasites a. 66.66 g b. 666.66 g
503. Which is not a purpose of disease assessment or disease appraisal? c. 6.66 g d. 0.66 g
a. to determine disease severity and prevalence 514. A recommendation calls for the application of 1.0 g a.i. of metalaxyl per kg
b. to determine alternate hosts of pathogens of corn seeds in slurry. If Apron 35 SD (formulated product) contains 50%
c. to relate disease severity to yield loss metalaxyl, how much is needed to treat 100 kg sweet corn seeds?
d. to express yield loss in financial term a. 200 g b. 20 g
504. A quiescent parasitic relationship which delays symptoms expression but c. 100 g d. 10 g
which may change into an active one 515. What is the percentage of damping off infection of pechay if 52 seeedlings
a. latent period b. incubation period were infected out of 100 seedlings in a plot?
c. cross protection d. latent infection a. 52% b. 48%
505. A principle of plant disease control applied if you are required to leave at c. 50% d. 192%
the airport plant materials you carried without phytosanitary certificate? 516. Signs that do not indicate fungal infection
a. mycelia tufts b. spores a. Echinochloa colona b. Eleusine indica
c. sclerotia d. gummosis c. Echinochloa glabrescens d. Rottboellia cochinchinensis
517. A fungus merely covering the surface of the plant without necessarily 530. The following are vegetative structures of a weed except
parasitizing it a. flowers b. branches c. tillers d. leaves
a. sooty mold b. slime mold 531. Crop weed interaction involves competition for these factors except
c. powdery mold d. grey mold a. light b. nutrients c. water d. vitamins
518. The naming of newly discovered fungal species is based commonly on 532. Weed occupies which trophic level?
a. location b. host a. 1st trophic level b. 2nd trophic level
c. distinct structural character d. well-known mycologist c. 3rd trophic level d. 4th trophic level
519. The fungal inocula that initiate rust disease outbreak in the tropics are the 533. The suspended growth of the embryo is due to propagule
a. uredospores b. teliospores a. dormancy b. germination c. respiration d.
c. basidiospores d. ascospores photosynthesis
520. For annual crops, the maximum number of nematode parasites can be 534. The technical term for weed establishment
recovered during a. ecstacy b. ecasis c. ecesis d. evasis
a. Fallow period b. Vegetative stage 535. The physical form of dormancy is brought about by the presence of
c. Flowering stage d. Near harvest stage a. inhibitors in the seed coat b. inhibitors in the embryo
521. The typical number of juvenile stages in the life cycle of a nematode is c. immature embryo d. thick seed coat
a. 2 b. 3 536. The density of weed above which significant reduction in the yield occurs
c. 4 d. 5 a. critical period b. critical time
522. What is the common pattern of nematode spatial distribution in a field? c. critical threshold d. critical stage
a. random b. patchy 537. The following are considered growth habit of weeds except
c. uniform d. none of the above a. tree b. vine c. shrub d. woody
523. The permanent nurse cells induced by root knot nematodes in roots are 538. The following are classification of weeds based on gross morphology
called except
a. galls b. syncytia a. epiphytic b. sedge c. grass d. broadleaf
c. giant cells d. nodules 539. The sedges possess the following traits except
524. From the site of inoculation, plant viruses spread through the plant in slow a. triangular stem b. parallel leaf venation
cell to cell c. single cotyledon d. hollow stem
spread through the 540. These structures are found in grasses except
a. stomata b. xylem a. ligule b. node c. internode d. netted venation
c. plasmodesmata d. phloem 541. Purple nutsedge is characterized by the
525. Which of the following should not be considered when identifying a plant a. presence of node b. presence of ligule
virus? c. hollow stem d. presence of tuber
a. genomic organization b. type of nucleic acid 542. Sedges, grasses and broadleaves belong to this classification:
c. shape of particle d. organization of protein a. body texture b. gross morphology
526. A general necrosis caused by the rapid growth and advance of the causal c. growth habit d. habitat
bacteria on the leaves and stems 543. The following are steps in the germination process except
a. wilt b. blast a. inhibition b. rapid metabolism
c. blight d. rot c. root emergence d. shoot emergence
527. Overgrowth of the protoplast of adjacent living parenchymatous cells, 544. An example of germination promoter
which protrude into xylem vessels through pits a. abscisic acid b. gibberrellic acid
a. gums b. tyloses c. potassium nitrate d. sulfuric acid
c. abscission layers d. cork layers 545. The plant pathogen present in Collego
a. Cercospora b.Colletotrichum
Weed Science c.Curvularia d.Helminthosporium
528. The following are common bases of classifying weeds except 546. The most limiting factor for competition in tropical countries during
a. gross morphology b. habitat c. growth habit d. anatomy dryseason
529. Itchgrass is the common name of a. nitrogen b. soil pH c. soil moisture d. sunlight
547. Efficient plants are characterized by the a. after the critical period of the crop b. during the critical period of
a. absence of chloroplast in the vascular bundle competition
b. low light saturation point c. throughout the cropping season d. during harvesting time
c. high light saturation point 561. Temperature has great influence on pollination process through its
d. high water requirement effecton the opening of the flower technically known as
548. Less efficient plants are known by the a. ecesis b. antheasis c. anthesis d. eceasis
a. presence of chloroplast in the vascular bundle 562. The main goal of weed science is:
b. high light saturation point a. the formulation of the most satisfactory, most efficient withoptimum cost of
c. low light saturation point controlling weeds
d. low water requirement b. the application of control measures which may not assurecomplete success
549. The type of competition existing betweenEchinochloa colona and but at least reduce population
junglerice c. the formulation of the most satisfactory, most efficient yet leastexpensive
a. intraspecific b. interspecific c. ultraspecific d. method of controlling weeds
extraspecific d. to hold pest population below their economic threshold level 3
550. Interspecific competition is exemplified by the interaction between 563. One of the following is not a definition of a weed:
a. itchgrass vs.Rottboellia b. rice vs. jungle rice a. a plant growing out of place b. a plant which interferes with man’s
c. rice vs.O. sativa d. corn vs. Zea mays objectives
551. The discipline in crop protection dealing with the study of plantscompeting c. a desirable plant d. a plant that has no economic values
witheconomically important crops 564. Which of the following is not an adverse effect of weeds?
a. Agronomy b. Crop Protection c. Weed Science d. Crop a. reduce yield of crops
Science b. clog irrigation and drainage canals
552. An annual weed completes its life cycle in c. reduce quality of products
a. one month b. one year c. two years d. more than d. do not compete with crops for light and nutrients
one year 565. Which of the following weeds is a grass?
553. Ligule is found in a. Saccharum spontaneum b. Cyperus rotundus
a. grass b. sedge c. broadleaf d. tree c. Scirpus maritimus d.Ipomea aquatica
554. The most number of weeds belong to the plant family 566. Which of the following weeds is a sedge?
a. Asteraceae b.Cyperaceae c.Poaceae a.Commelina benghalensis b.Cyperus iria
d.Convolvulaceae c.Eleusine indica d.Euphorbia hirta
555. Imbibition process involves absorption of 567. Which of the following is not a broadleaf weed?
a. oxygen b. nitrogen c. water d. light a.Ipomea triloba b. Echinochloa colona
556. In germination, the period of rapid metabolic activity is bestcharacterized c.Amaranthus spinosus d. Monochoria vaginalis
by 568. One of the following is herbaceous weed
a. faster rate of reproduction b. faster photosynthetic activity a.Synedrella nodiflora b. Sida rhombifolia
c. faster rate of senescence d. faster cell division and elongation c.Sida acuta d. Peperomia pellucida
557. The author of the book entitled “Introduction to Weed Science”published in 569. Which of the following weeds germinate under water thenfloat as soon as
thePhilippines its primary leaf emerge?
a. Marcos R. Vega b. Beatriz L. Mercado a. Brachiaria mutica b. Pistia stratiotes
c. Bonifacio T. Mercado d. Juliana S. Manuel c. Lantana camara d. Ipomea triloba
558. The history of weed science can be equated to the discovery of thekilling 570. The following are distinguishing features of grasses except one:
propertyof this herbicide during the second World War a. leaves are 2 – ranked that arise alternately from nodes
a. butachlor b. napropamide c. propanil d. 2, 4 – D b. round stems
559. Exposure of weed seeds to low temperature to overcome dormancy c. leaf blades are narrow with parallel veins
a. stratification b. scarification c. mineralization d. d. no distinct division between leaf blade and leaf sheath
germinalization 571. One of the following is not a feature of sedges:
560. Weed control activities must be done during this stage to ensure good a. stems are solid and triangular
yield b. flowers are enclosed by a lemma and palea
c. leaves are 3 – ranked
d. no distinct division between leaf blade and leaf sheath a. Sida acuta b. Lantana camara
572. It is a period when seedling starts to manufacture its own food, leading c. Acacia arabica d. Imperata cylindrica
toan increase in weight. The seedlinhg is on its way to ecesis. 582. A weed species that is associated with corn plants and has the ability
a. Period of shoot emergence b. Period of independent growth toproduce 5, 000 seeds per life cycle is:
c. Photperiodism d. Period of elongation a. Rottboellia exaltata b. Brachiaria mutica
573. Which of the following statements describe “noxious weeds”best: c. Cyperus rotundus d. Ipomea triloba
a. highly competitive, reduce yield of crops even at lowdensities and are difficult 583. Weed seeds can remain viable in the soil for a long time, and the
to control longestever recorded in the world was that found in dried up Manchurian
b. undesirable, troublesome but easy to control Lakewhose age was about 1 040 years. That species is
c. species that are not at all used as crops and behave as weed allthe time a. Avena fatua b.Nelumbo nucifera
d. plants that are neither all bad nor all good c.Elephantopus spicatus d.Portulaca oleracea
574. Like any other plant, the germination of weed seeds is affected by agroup 584. A type of seed dormancy that takes place when a seed or propagule
of environmental factors such as: issubjected to conditions unfavorable for germination.
a. water, oxygen, temperature a. Primary dormancy b. tertiary dormancy
b. water, oxygen, light, temperature c. Secondary dormancy d. none of the above
c. water, oxygen, carbon dioxide 585. Abrasion, pricking, nipping and dehulling of seeds are examples of
d. water, light, temperature, carbon dioxide whatmethod of breaking dormancy
575. It is a stage in weed seed germination where cell division and a. stratification b. mechanical scarification
cellelongation proceed at a fast rate supported by a rapid synthesis ofmaterials c. scarification d. chemical scarification
resulting in a perceptible growth of the embryo. 586. A method of breaking dormancy by physically puncturing theseedcoat of
a. period of independent growth b. root or root – like elongation hard shelled seeds:
c. emergence of the shoot d. period of rapid metabolic activity a. stratification b. mechanical scarification
576. Under field condition, this is considered as the first sign of weed growth. c. scarification d. chemical scarification
a. imbibitions b. root or root – like elongation 587. A type of weed seed germination where the cotyledons are carried
c. period of independent growth d. emergence of the shoot orraised above the ground where the cotyledons provide nutritive supportto the
577. A stage in the germination process where the cotyledons and the growing embryo is:
embryoabsorb water a. hypogeal germination b. sigmoidal germination
a. imbibition b. period of rapid metabolic activity c. epigeal germination d. colloquial germination
c. root or root – like elongation d. period of independent growth 588. The stage in weed seed germination when dependence on the
578. The most important reason why light is required in the germinationof weed foodreserve ceases and seedling starts to manufacture its own food.
is: a. period of rapid metabolic activity b. root or root –like elongation
a. needed in respiration or the breakdown of stored food to beused by the c. emergence of the shoot d. period of independent growth
growing embryo 589. An environmental factor that is optional in the germination of cropseeds
b. inactivate the germination inhibitor in the seed but very important in the germination of most weed seeds
c. required in the hydrolysis of food reserve a. moisture b. light c. temperature d. oxygen
d. reduce the moisture content of the seed to level below thatrequired for 590. A cultural management that effectively control the growth of
viability weedsbecause it prevents oxygen to enter the soil and also cause
579. The most practical time to control weeds especially when usingherbicide is accumulationof carbon dioxide and other gaseous products of anaerobic
during their seedling stage because: respirationthereby killing the embryo of weed seeds.
a. it is the stage where damage against the crop is becoming apparent a. mowing b. burning c. flooding d. mulching
b. it is the most competitive stage for growth resources 591. A type of soil with high water holding capacity and can thereforekeep
c. it is the stage where leaves are succulent and still lack cutin orwaxes and the weed seeds viable for a longer period is:
roots have thin epidermal walls a. sandy soil b. clay soil c. loamy soil d. rocky soil
d. it is the most destructive stage 592. The predominance of weed species in the field is due to all of thefollowing
580. All of the following are beneficial effects of weeds except one: reasons except one:
a. weeds conserve soil moisture c. weeds provide employment a.their ability to induce dormancy when exposed to unfavorable condition
b. weeds prevent soil erosion d. weeds have no medicinal value sthereby escaping weed control measure
581. All of the following weeds have woody stems except one:
b.they survive better than cultivated plants due to built – in mechanism for 604. Not all weeds are destructive, some are useful to man in terms of:
adaptation a. providing food b. source of prohibited drugs
c. they have very slow vegetative growth c. makes the soil acidic d. source of pathogen microorganism
d. high capacity for reproduction and efficient mechanism foradaptation 605. Weeds can also cause losses in terms of its effects on watermanagement
593. The ability of weed seeds to become dormant when exposed such as:
tounfavorable condition is mechanism for: a. serves as barrier for inland waterways and harbors
a. reproduction b. adaptation c. germination d. competition b. active evaporation
594. Some weed species preferentially absorb some nutrients and wouldgrow c. serves as growth medium
better in soils rich in these elements. Amaranthus for instance prefer: d. harbors fishes and crabs
a. nitrogen b. potassium c. calcium d. 606. Some weed species can cause hazard to human health as well as
phosphorous livestock. This aquatic weed serves as host habitat to mosquitoescarrying the
595. Cleome rutidosperma and Pistia stratiotesare weed species thatprefer to parasite responsible for rural filariasis andencephalomyelities
absorb or accumulate: a. Pistia stratiotes(water lettuce) b. Amaranthus spinosus(spiny
a. calcium b. manganese c. Phosphorous d. potassium amaranth)
596. A weed species that was introduced into the Philippines as anornamental c. Imperata cylindrica(cogon) d. Monochoria vaginalis(pickerel weed)
plant during the Spanish regime but is now considered as themost serious 607. Some weeds are toxic to human and livestock. This species
weed in the country causediarrhea resulting to death of animals:
a. Monochoria vaginalis b. Eichhornia crassipes a. Tridax procumbens b. Chromolaena odorata
c.Ludwigia octovalvis d.Digitaria ciliaris c. Portulaca oleracea d. Eleusine indica
597. The competitive power of the weed is its most importantammunition in the 608. Annual weeds likeAmaranthusandSphenocleareproduce mainlyby seeds
battle for survival and this is attributed to its and complete its life cycle in:
a. rapid growth and development a. one cropping season b. one year c. one month d. one
b. ability to produce toxic chemicals week
c. inefficient mechanism for adaptation 609. Grassy weeds (Poaceae) look similar to sedges except that theirstem
d. inability to induce dormancy during adverse condition called culm is:
598. The birth of weed science as a discipline came about only after a. triangular b. cylindrical c. polyhedral d.
thediscovery of the herbicidal properties of: shapeless
a. Pendimethalin b. 2, 4 – D c. Bentazon d. Auxin 610. The membranous outgrowth in between leaf sheath and leaf bladein
599. The problem of hand weeding the rice field during the vegetativestage is grasses is called:
the difficulty of identifying the seedlings because grass weeds andrice a. leaf blade b. petiole. c. ligule d.
seedlings at this stage are very similar in their: angular
a. ontogeny b. biology c. physiology d. 611. Weeds adapt to the growing condition of the area. This turf grasswas
morphology introduced to Southeast Asia as a turf but growing luxuriantly as aweed:
600. A grassy weed capable of producing contractile roots and arrestedshoot a. Echinochloa colona b. Eleusine indica
growth when subjected to extremely dry condition c. Cynodon dactylon d. Digitaria spp.
a. large crab grass b. itch grass c. mud grass d. snod grass 612. The most competitive stage of the weed is:
601. Damage caused by weeds are generally not visible or noticeablebecause: a. mature stage b. seedling stage c. juvenile stage d. early
a. weeds seldom causes total crop failure stage
b. weeds are always associated with domestic animals 613. Which among the following weed species is an example of
c. it is not easy to see and count weeds amonocotyledonous broadleaf?
d. weeds are hard to control a. Bidens pilosa b. Imperata cylindrica
602. Which weed do not belong to the group: c. Monochoria vaginalis d. Sphenoclea zeylanica
a. Eleusine indica b. Paspalum distichum 614. The measure of the adaptive potential of a weed that enables it tosurvive
c.Monochoria vaginalis d. Rottboellia cochinchinensis in an environment which is continuously disturbed by a man isreferred to as:
603. Broadleaf weeds are those with expanded leaf blades which includethe a. adaptability b. phenology c. persistence d. sociability
following, except one: 615. In weed sampling, a student determined the density and biomass of
a. Amaranthus spinosus b. Monochoria vaginalis weeds in a corn area. If he is to compute for the Summed Dominance Ratio of
c. Synedrella nodiflora d. Rottboellia cochinchinensis all weeds found in the area, he should:
a. Get the sum of the relative values of density and biomass c. critical period of weed density d. critical period of weed
b. Get the sum of the relative value of density and biomass thendivide it by 3. competition
c. Determine the sum of density and biomass and divide the sumby 2. 625. Annual weeds are known to be present in the farm every season inspite of
d. Determine the sum of the relative values of density and biomassthen divide good control measures because:
the sum by 2. a. they happen to thrive in there
616. A weed which germinates, grow vegetatively, produces seeds and isable b. they have enormous amount of seeds in the soil
to live from year to year is: c. their seeds are not dormant
a. annual weed b. dicot weed c. monocot weed d. d. they have vegetative propagules in the soil
perennial weed 626. Which among the following best describes a weed in relation to
617. Which of the following weeds could be found in lowland rice areas? cropproduction:
a. Bulrush b. Dayflower. c. Tropic ageratum d. a. it is a product of natural selection
Sprangle top b. it is a pest at a particular situation
618. Weeds found in temperate areas differ from those in the tropicsbecause c. it is a plant without any use nor function
of: d. it is a plant whose virtues have not yet been discovered
a. difference in soil condition b. difference in crops grown 627. Poisoning specimens for herbarium collection means
c. difference in climatic conditions d. all of the above a. Putting it in an oven or under the sun to dry
619. Which among the following weeds is a sedge? b. Dipping it in a solution that would inhibit pest attack
a. beggarstick b. bulrush c. little iron weed d. spreading c. Flattening the specimens by putting any heavy object on top
dayflower d. Cutting it into small parts to facilitate drying
620. Weeds with complete plant parts should be collected for aherbarium 628. The best time to collect weeds is during:
because: a. lunch time b. early morning c. late in the afternoon d. none of the
a. it would facilitate easier identification of the weed above
b. it would provide a good specimen 629. It refers to the number of weeds in a given unit area
c. it would be a good practice to do so a. biomass b. density c. frequency d. summed dominance
d. it would be attacked by molds ratio
621. In crop production, the primary reason why weed is considered as apest 630. It refers to the amount of organic matter produced per unit area
is: a. biomass b. density c. frequency d. summed dominance
a. it is able to harbor other organisms ratio
b. it is able to significantly lower the quantity and quality ofproducts 631. Which among the following is a perennial weed?
c. it produces seeds and vegetative propagules a. Ageratum conyzoides b. Cyperus iria
d. it annoys human c. Paspalum distichum d. Synedrella nodiflora
622. Seed dormancy is an important adaptive mechanism of weedsbecause: 632. Identification of weeds at the seedling stage is quite difficult because
a. it permits weeds to germinate when environment conditions in thefarm would a. Weeds belonging to the same family are very similar in appearanceat this
give a greater chance for its survival stage
b. it permits germination of the weeds after the crop has beenestablished b. Weeds cannot be easily seen due to their small size
c. it removes the capacity of the weeds to reproduce asexually c. Weeds tend to grow taller than crops
d. it prevents the weed seeds under the soil from decaying d. Weeds do not grow at this time
623. A grass is a weed which: 633. Which among the following factors is always important for weed
a. has a hollow cylindrical culm, distinct nodes and internodes, leaves that are germination?
arranged alternately and arises from the nodes a. light b. amount of photosynthesis c. temperature d.
b. has long, narrow and thin leaves water
c. has triangular stem, no distinct nodes and internodes and leavesthat are 634. Which among the following weed species is a perennial sedge?
arranged in a rossette manner a. Ageratum conyzoides b. Scirpus maritimus
d. a and b c. Paspalum conjugatum d. Sphenoclea zeylanica
624. The period or stage in the life cycle of the crop where weed’spresence 635. Which among the following weed species is a perennial grass?
could affect yield of the crop is referred to as: a. Commelina diffusa b. Pistia stratiotes
a. critical density of weed competition b. critical threshold density c. Chromolaena odorata d. Panicum maximum
636. Which sampling parameter describes how often a weed is found 649. The following weed species reproduce asexually except:
insampling areas? a. Cyperus rotundus b. Fimbristylis littoralis
a. biomass b. density c. frequency d. summed dominance c. Pistia stratiotes d. Cynodon dactylon
ratio 650. When the development of weed occurs within one year, thesuitable weed
637. The following are weeds found in upland areas except: classification is:
a. barnyard grass b. goose grass c. spindle top d. spiny amaranth a. body texture b. gross morphology c. growth habit d. life span
638. A monocot weed is one with: 651. The most feared group of weeds based on life span is:
a. Fibrous root system and leaves having parallel venation a. annuals b. biennials c. simple perennials d. creeping
b. Taproot system and leaves having netted venation perennials
c. Fibrous root system and leaves with netted venation 652. Annual weeds reproduce mainly by seeds and complete its life cyclein:
d. Taproot system and leaves having parallel venation a. one cropping season b. one year
639. More than 95% of the weeds that infest crops come from c. one month d. one week
a. neighboring farms through irrigation water 653. Weeds that produce below ground reproductive structures and
b. neighboring farms brought by wind seedswhich are able to survive from year to year are called as:
c. the soil a. annual weeds b. monocot weeds
d. all of the above c. dicot weeds d. perennial weeds
640. Seeds of Rottboellia exaltatahas a dormancy period of: 654. Which among the weed species reproduces by seeds alone?
a. one month b. three months c. two months d. four months a. Commelina diffusa b. Imperata cylindrica
641. Sorghum halepenseis the scientific name of: c. Pistia stratiotes d. Synedrella nodiflora
a. Cogon grass b. Guinea grass c. Johnson grass d. Napier 655. Water lettuce is an aquatic perennial weed that reproduces by meansof
grass seeds and:
642. For most weed species, there is a critical moisture level at whichthe a. stolon b. rhizome c. offshoot d. tuber
embryo is rendered non-viable. For instance, Cyperus rotundustuber has a 656. A shallow rooted perennial weed is:
critical moisture content ranging from: a. Sorghum halepense b. Saccharum spontaneum
a. 16 to 20% b. 11 to 15% c. 13 to 16 % d. 10 to c. Cyperus rotundus d. Cynodon dactylon
13% 657. A slender above-ground stem produced by Cynodon dactylonand
643. The growth stage of weed where it can compete strongly with crop Brachiaria muticais called:
forgrowth resources such as light, water and nutrients: a. rhizome b. bulb c. tuber d. stolon
a. flowering stage b. maturity stage c. germination stage d. seedling 658. The primary propagule ofImperata cylindricais:
stage a. tuber b. stolon c. rhizome d. seed
644. One of the following weed species exudes toxic substance that 659. The following weed species are perennials except:
wouldinhibitthe germination, growth and development of other species: a. Cyperus rotundus b. Fimbristylis littoralis
a. Monochoria vaginalis b. Leptochloa chinensis c. Pistia stratiotes d. Cynodon dactylon
c. Imperata cylindrica d. Cyperus compressus 660. Using habitat as a basis of classification, rice- associated weeds
645. Rottboellia exalta population of one plant per sq m. will produce howmany areclassified as:
seeds in a hectare after one growing season? a. dry land b. wetland c. emergent d. submergent
a. 5 million b. 50 million c. 500 million d. 60 million 661. Sedges, grasses and broadleaves belong to this classification:
646. Broadleaves are those with expanded leaf blades and netted leafvenations a. body texture b. gross morphology
which excludes: c. growth habit d. habitat
a. Amaranthus spinosus b. Synedrella nodiflora 662. Weeds that have two-ranked leaves are:
c. Sida acuta d. Eleusine indica a. grasses b. sedges c. broadleaves d. aquatic weeds
647. The following weeds are monocots except: 663. Weeds that thrive on watery areas are called as:
a. Eleusine indica b. Sphenoclea zeylanica a. terrestrial b. aquatic c. epiphytes d. saprophytes
c. Leptochloa chinensis d. Rottboellia cochinchinensis 664. Aquatic weeds are classified into:
648. Which among the following weed species is an example of a. wetland b. floating c. emergent d. submergent
amonocotyledonous broadleaf? 665. Aquatic weeds with roots that are anchored on the soil but shootsare
a. Ipomea aquatica b. lmperata cylindrica above water are:
c. Monochoria vaginalis d. Sphenoclea zeylanica a. floating hydrophytes b. emergent hydrophytes
c. submergent hydrophytes d. parasitic hydrophytes b. Competing ability of the cropc. Crop spacing
666. This is a small, thorny flowering weed (shrub), with square stem, avery d. All of the above
common weed in crop lands, is very toxic when ingested bylivestock: 678. What is the most widely distributed plant in the world accordingto the
a. Sida acuta b. Tagetes patola Guinness Book of World Records?
c. Cuscuta rhombifolia d. Lantana camara a. Cynodon dactylon b. Cocos nucifera
667. Which of the following weed species is found growing in lowland areas? c. Codaeum variegatum d. Cyperus rotundus
a. barnyard grass b. dayflower c. tropic ageratum d. spiny 679. Which among the following weed is spread by wind?
amaranth a. Echinochloa crusgalli b. Mimosa pudica
668. Which of of the following weeds could be found in lowland rice areas? c. Vernonia cinerea d. Rottboellia cochinchinensis
a. Sprangle top b. Dayflower c. Tropic ageratum d. Common 680. The tubers of Cyperus rotundus will remain dormant if:
purslane a. there is continuous cultivation
669. A period characterized by rapid cell division and elongationaccompanied b. herbicides are not applied
by faster synthesis of materials. c. they are left intact due to no tillage
a. Period of independent growth b. Period of root elongation d. area where they are growing is left unweeded
c. Period of metabolic activity d. none of the above 681. An upland tillage that directs the soil towards the base of the plantsat 25-
670. Which among the following weeds is classified as sedge? 30 days after sowing that can control a weed growing along the rowis:
a. erect spiderling b. sour paspalum a. off barring b. hilling up c. plowing d. harrowing
c. spreading dayflower d. kyllingia 682. An upland tillage operation that directs the soil away from the base ofthe
671. Which among the following describes a weed in relation to plants at 15 days after sowing that can control weeds growing inbetween the
cropproduction? rows.
a. it is a product of natural selection a. off barring b. hilling up c. plowing d. harrowing
b. it is a pest at a particular situation 683. Cultivation can accomplish weed control by:
c. it is a plant without any use or function a. burial of weeds b. cutting of aerial & below-ground part
d. it is a plant whose virtues have not been discovered c. desiccation of roots d. all of the above
672. Weed species that are toxic to human and livestock can causediarrhea 684. Cyperus rotundus is able to persist because:
resulting to death of animals. a. it reproduces asexually
a. Tridax procumbens b.Chromolaena odorata b. the seed has pappus which enables it to be disseminated by air
c. Portulaca oleracea d. Eleusine indica c. seeds have long viability period
673. The desire to control weeds intensively started when the herbicidal d. none of the above
potential of 2, 4-D was discovered in 1944 in the U.S. of America. “D” in 2,4-D 685. The following weeds are found growing in upland areas except:
stands for? a. barnyard grass b. carabao grass c. spindle top d. spiny
a. Diazinon b. Dichlorophenoxy acetic acid amaranth
c. Dichlorophenyl isothiocyanate d. Dichloro-diphenyl-trichloroethane 686. Major weeds of crops deposited in the soil seed bank are estimated tobe
674. It influenced dry matter production of the weed. Plants exposed to at:
thiselement produce smaller leaves but higher number of tubers whilereduction a. 1 – 5% b. 10 - 20% c. 50 – 70% d. 70 – 90%
of this element reduces tuber formation. 687. Water aids in the dispersal of aquatic weeds. Bouyancy of some
a. soil texture b. mineral sufficiency c. water d. light weedseeds/whole weed can be attributed to the presence of pericarp
intensity thatconsists of light tissues or through an inflated structure. Which is notan
675. A new leguminous cover crop being used in oil palm and example of weed described above?
rubberplantations: a. Eichhornia crassipes b. Pistia stratiotes
a. Calopogonium mucunoides b. Centrosema macrocarpum c. Sida acuta d. Echinochloa glaberescens
c. Arachis pentoi d. Mucuna bracteata 688. Which of the following weeds reproduces by rhizomes, tubers andseeds?
676. Competition is said to be critical during the young stage of the cropwhich a. cogon grass b. bermuda grass
is estimated to be the first 1/3 to ½ of the crop duration. This isknown as the c. purple nut sedge d. all of the above
a. Critical threshold level c. Critical time index 689. The most successful weed dispersal agent is:
b. Critical period of competition d. Crucial crop stage a. wind b. human being c. animals d. water
677. Which of the following affected the degree of crop-weed competition? 690. Which of the following growth stages of weeds is best foridentification?
a. Competing ability of the dominant weed species a. seedling stage b. tillering stage
c. flowering stage d. all of the above 703. Most often, weeds compete with crops for:
691. Which of the following growth stages of weeds is best for control? a. space b. soil nutrients and water c. solar radiation d. b and c
a. seedling stage b. tillering stage 704. Weeds at their seedling stage can mimic the associated crop exceptin
c. flowering stage d. all of the above association of:
692. Which of the following weed species is predominant in a. itch grass-corn b. barnyard grass-rice
transplantedirrigated lowland rice? c. jungle rice-rice d. itch grass-peanut
a. pickerel weed b. barnyard grass c. cogon grass d. goose 705. Seed dispersal through water run off is common among weedsbecause of:
weed a. light weight and possess oily film to enable them to float
693. Once a crop is infested with weeds, a significant yield reduction: b. impermeability to water
a. will surely occur c. sometimes possessing swimmerets
b. may occur d. active swimmers
c. will occur if population has reached a level that cannot betolerated by the 706. The dispersal unit ofPhysalis angulatacan be disseminated bywind
crop because it is aided by:
d. all of the above a. hairy calyx b. wings c. hairy styles d. balloons
694. Seeds of weed with very light or minute, flattened or winglike 707. A weed with dense leaf clusters and swollen base of petioles thatpossess
structuresare easily dispersed by wind.Members of Asteraceae family contain spongy tissues which enable them to float in water is:
pappus(consists of a circle of hairs) which aids in efficient distribution. An a. Pistia stratiotes b. Monochoria vaginalis
exampleof this weed is________. c. Eichhornia crassipes d. Marsilea crenata
a. Mimosa pudica b. Tridax procumbens 708. A stem parasitic plant found associated with deciduous trees and
c. Monochoria vaginales d. Pistia stratiotes iscommonly known as “mistletoe” or “tree thief” :
695. Parasitic plants such as “mistletoe” or “tree thieves” are under Family: a. Cuscuta sp b. Ficus sp c. Phoradendronsp d. Alnus
a. Convolvulaceae b. Rubiaceae c. Sterculiaceae d. sp
Viscaceae 709. A woody shrub is classified as:
696. Weed seeds are banked in the soil that is why weeds are: a. body texture b. gross morphology c. growth habit d. habitat
a. competitive b. reproductive c. persistent d. 710. Weed seed imbibition involves the absorption of:
pernicious a. oxygen b. water c. nitrogen d. light
697. The majority of the weed seeds entering the seed bank in agriculturalland 711. A method where one can still harvest profitable crops in spite ofthe
come from: presence of weeds is:
a. annual weeds b. perennial weeds c. biennial weeds d. both a a. weed control b. weed competition
and b c. weed prevention d. weed eradication
698. Most weeds belonging to family Asteraceae likeVernonia cinereaare easily 712. The use of certified crop seeds, clean tools and machineries for tillageare
carried by wind from one place to another due to: examples of what type of weed management?
a. seed appendages like pappus b. seeds are enclosed in burrs a. weed prevention b. weed eradication
c. seeds are covered by an oily film d. seeds are dormant c. weed control d. none of the above
699. The following are structures that aid in weed seed dispersal by 713. Among the weed management approaches, this appears to be themost
windexcept: practical since it aims for desirable weed suppression.
a. hairy style b. wings c. hairy calyx d. sharp spines a. prevention b. eradication c. control d. none of the
700. Seeds of Cenchrus echinatusare easily disseminated by man andanimals above
because: 714. An approach to weed management that implies non-exchange
a. their seeds are light and numerous ofweedsfrom one area to another
b. their seeds are enveloped by thin and oily membrane a. prevention b. eradication c. control d. none of the
c. their seeds are enclosed in a burr above
d. none of the above 715. For this management level or approach to be effective, quarantinesmust
701. A structure facilitating the dispersal of weeds: be established and legislative control required
a. hook b. water c. man d. wind a. prevention b. eradication c. control d. none of the
702. Plants that are tall statured always have a competitive advantageover above
short plants for: 716. When the weed management level applies balance betweeneconomic
a. water b. sunlight c. nutrients d. oxygen gains and actual cost of weed control practiced, it is saidto be:
a. prevention b. eradication c. control d. none of the 728. What is the amount of Atrazin (80% WP) per hectare if the rate
above ofapplication is 1.0 kg ai/ha.
717. One of the following weed species exudes toxic substance that a. 1.25 b. 1.50 c. 8.0 d. 12.5
wouldinhibit the germination, growth and development of other species: 729. If the recommended rate of application of 2,4-D is 40% active ingredient
a. Monochoria vaginalis b. Imperata cylindrica per liter is 1.0kg ai/ha. If the delivery of 16 liters knapsacksprayer is 200 liter
b. Leptochloa chinensis d. Cyperus compressus per hectare, what is the volume of the herbicide for eachtank load?
718. Some weed species preferentially absorb some nutrients and wouldgrow a. 100 ml b. 200 ml c. 300 ml d.400 ml
better in soils rich in these elements. The growth of such weed species can 730. If the rate of a powder herbicide containing 50% active ingredient is 2.0 kg
sometimes be used as indicator of: ai/ha, the weight of the formulated product needed for one hectareis:
a. moisture content of the soil b. nutrient content of the soil a. 1.0 kg b. 2.0 kg c. 3.0 kg d. 4.0 kg
c. organic matter content of the soil d. none of the above 731. Glyphosate has 480g/L active ingredient, what is the percentage
719. The following are weed vegetables except activeingredient?
a. Ipomea aquatica b. Lantana camara a. 4.8% b. 48% c. 480% d. 4800%
c. Corchorus olitorius d. Amaranthus spinosus 732. Mang Juan ould like to control weeds in his broadest seeded wetlandrice
720. Flooding the field up to 5.1 cm deep reduce drastically thegermination of with Sofit 300EC. The herbicide contains 300g a.i. / liter product.How many
some weeds but stimulates the germination of oneof the following seeds: liters of Sofit 300 EC is needed per hectare if applied at 1.0kg a.i./ha?
a. Echinochloa crusgalli b. Sesbania sesban a. 1.66 liters b. 3.33 liters c. 3 liters d. 30 liters
c. Brachiaria mutica d. Pistia stratiotes 733. A farmer wanted to control grassy weeds in his soybean with Onecide15
721. Seeds ofRottboellia exaltatahas a dormancy period of: EC at 0.0150 kg ai/ha. How many liters of Onecide 15 EC is needed tospray
a. one month b. three months c. two months d. four months 5000 m2?
722. The following conditions except one shortens the longevity(viability) of a. 0.05 L b. 0.10 L c. 1 L d. 1.5 L
weed seeds in the soil due to reduction of the moisturecontent of the seed: 734. Herbadox (20% Pendimethelin) will be used to control anguingay incorn. If
a. sandy soil b. high light intensity c. high temperature d. mineral applied at the rate of 1.0 kg a.i./ha, how many liters of Herbadox isneeded per
soil hectare?
723. Crop competitiveness to weeds include the following traits exceptone: a. 1 L b. 2 L c. 3 L d. 5 L
a. vigorous growth b. low leaf area index 735. 2,4-D herbicide is to be used for the control of broadleaf weeds in riceat
c. early emergence d. plant height the rate of 0.50 kg a.i./ha. How many milliliters of 2,4-D Aminecontaining 400 g
724. A twining, obligate parasitic plant commonly known as “dodder”or “witches a.i./ liter is needed per hectare?
hair” is under Family a. 125 ml b. 500 ml c. 1,250 ml d. 2,000 ml
a. Viscaceae b. Convolvulaceae c. Rubiaceae d. 736. A 1.66 liters of Butachlor is required to control grasses in one
Sterculiaceae hectarericefield. The recommended rate is 1.0 kg a.i./ha. What is the
725. A twining, obligate stem parasitic plant of crops which taps in on thehost’s activeingredient of the herbicide?
nutrient supply with a modified root system or haustorium and iscommonly a. 40% b. 50% c. 60% d. 70%
known as “dodder” or “witches hair” is scientifically known as 737. In Premox 80 WP, the percentage active ingredient is.
a. Cuscuta sp b. Arceothobium sp c. Phoradendron sp a. 0.80% b. 8% c. 80% d. 800%
d.Viscum sp 738. What is the amount of Atrazin (80% WP) needed per hectare if the rate of
726. These are all preventive weed control in lowland rice measures application is 1.0 Kg ai/ha.?
exceptone: a. 1.25 b. 1.50 c. 8.0 d. 12.5
a. use of weed-free seeds 739. If the recommended rate of application of 2,4-D is 40% active ingredient
b. not allowing weeds to produce seeds or reproduce vegetatively per liter is 1.0 Kg ai/ha. If the delivery of a 16 liters knapsack is 200L/ha, what is
c. post-emergence herbicide the volume of the herbicide for each tankload.
d. keeping tools and irrigation canals free of weeds a. 100 ml b. 200 ml c. 300 ml d. 400 ml
727. The scentless mayweed was chosen as model weed species for astudy on 740. If the rate of a powder herbicide containing 50% active ingredients is 2.0
modeling weed population dynamics: impact of cultural controland climate Kg ai/ha, the weight of the formulated product needed for one hectareis:
change. This weed is scientifically known as a. 1.0 Kg b. 2.0 Kg c. 3.0 Kg d. 4.0 Kg
a. Cleome rutidosperma b. Cuscuta sp 741. Glyphosate has 480g/L active ingredient, what is the percentage
c. Phoradendronsp d. Tripleurospermum inodorum activeingredient?
a. 4.8% b. 48% c. 480% d. 4800%
742. Mang Juan would like to control weeds in his broadcast seededwetland d. area where they are growing is left unweeded
rice with Sofit 300 EC. The herbicide contains 300 g ai / literproduct. How many 754. The following weeds are found growing in upland areas except:
liters of Sofit 300 EC is needed per hectare if applied at1.0 Kg ai/ha? a. barnyard grass b. spindle top
a. 1.66 L b. 3.33 L c. 3 L d. 30 L c. carabao grass d. spiny amaranth
743. A farmer wanted to control grassy weeds in his soybean with Onecide15 755. Major weeds of crops deposited in the soil seed bank are estimated to be
EC at 0.0150 Kg ai / ha. How many liters of Onecide 15 EC is needed tospray at:\
5000 m2? a. 1 – 5% b. 10 - 20%
a. 0.05 L b. 0.10 L c. 1 L d. 1.5 L c. 50 – 70% d. 70 – 90%
744. Herbadox (20% Pendimethelin) will be used to control anguingay incorn. If 756. More than 95% of the weeds that infest the crop come from:
applied at the rate of 1.0 Kg ai/ha., how many liters of Herbadox isneeded per a. neighboring farms due to irrigation water
hectare? b. the soil
a. 1 L b. 2 L c. 3 L d. 5 L c. neighboring farms brought by wind
745. 2,4-D herbicide is to be used for the control of broadleaf weeds in riceat d all of the above
the rate of 0.50 Kg ai/ha. How many milliliters of 2,4-D Amine containing400 g 757. Which of the following weeds reproduces by rhizomes, tubers and seeds?
ai/liter is needed. a. cogon grass b. purple nut sedge
a. 125 ml b. 500 ml c. 1,250 ml d. 2000 ml c. bermuda grass d. all of the above
746. A 1.66 liters of Butachlor is required to control grasses in one 758. The most successful weed dispersal agent is:
hectarericefield. The recommended rate is 1.0 Kg ai/ha. What is the a. wind b. human being
activeingredient of the herbicide? c. animals d. water
a. 40% b. 50% c. 60% d. 70% 759. Which of the following growth stages of weeds is best for control?
747. In Premox 80 WP, the percentage active ingredient is: a. seedling stage b. flowering stage
a. 0.80% b. 8% c. 80% d. 800 c. tillering stage d. all of the above
748. The period or stage in the life cycle of crops where the presence of weeds 760. Which of the following weed species is predominant in transplanted
could affect the yield of the crop is: irrigated lowland rice?
a. critical density of weed competition b. critical threshold density a. pickerel weed b. cogon grass
c. critical threshold level d. critical period of competition c. barnyard grass d. goose weed
749. The competitive power of the weed is its most important ammunition in the 761. The density of weeds above which significant reduction in yield occurs:
battle for survival and this is attributed to their: a. critical period b. critical time
a. rapid growth and development c. critical threshold d. critical stage
b. inefficient mechanism for adaptation 762. Weed seeds are banked in the soil that is why weeds are:
c. ability to produce toxic chemicals a. competitive b. reproductive
d. inability to induce dormancy during adverse condition c. persistent d. pernicious
750. Competition is said to be critical during the young stage of the crop which 763. The majority of the weed seeds entering the seed bank in agricultural land
is estimated to be the first 1/3 to ½ of the crop duration. This is known as the come from:
a. Critical threshold level b. Critical period of competition a. annual weeds b. biennial weeds
c. Critical time index d. Crucial crop stage c. perennial weeds d. both a and c
751. Identification of weeds at the seedling stage is quite difficult because: 764. The following are structures that aid in weed seed dispersal by wind
a. weeds belonging to the same family are very similar in appearance except:
b. weeds cannot be seen due to their small size a. hairy style b. wings
c. weeds tend to grow taller than the crop c. hairy calyx d. sharp spines
d. weeds do not grow at this time 765. A structure facilitating the dispersal of weeds:
752. Which among the following weed is spread by wind? a. hook b. water
a. Echinochloa crusgalli b. Vernonia cinerea c. man d. wind
c. Mimosa pudica d. Rottboellia cochinchinensis 766. Plants that are tall statured always have a competitive advantage over
753. The tubers of Cyperus rotundus will remain dormant if: short plants for:
a. there is continuous cultivation a. water b. sunlight
b. herbicides are not applied c. nutrients d. oxygen
c. they are left intact due to no tillage
767. Weeds at their seedling stage can mimic the associated crop except in 780. The problem encountered with hand weeding the rice field during the
association of: vegetative stage is the difficulty of identifying the seedlings because grass
a. itch grass-corn b. jungle rice-rice weeds and rice seedlings at this stage are very similar in their:
c. barnyard grass-rice d. itch grass-peanut a. life cycle b. biology
768. The dispersal unit of Physalis angulata seeds can be disseminated by c. physiology d. morphology
wind because it has 781. Placement of dried plant materials and plastic sheets in seedling beds in
a. hairy calyx c. wings order to suppress weed growth is:
c. hairy styles d. balloons a. crop rotation b. cover cropping
769. A weed with dense leaf clusters and swollen base of petioles that possess c. mulching d. flooding
spongy tissues which enable them to float in water is: 782. The following are considered cultural method of weed control except:
a. Pistia stratiotes b. Eichhornia crassipes a. choice of the variety b. flooding
c. Monochoria vaginalis d. Marsilea crenata c. mulching d. use of rotary weeder
770. The following are considered growth habit of weeds except in: 783. Which of the following organisms can be used as a biological control agent
a. tree b. shrub for weeds?
c. vine d. woody a. insects b. pathogens
771. A woody shrub is classified as: c. sheep d. all of the above
a. body texture b. gross morphology
c. growth habit d. habitat 784. An effective biological agent of weeds should:
772. Weed seed imbibition involves the absorption of: a. feed and reproduce only on the specific problem weed species
a. oxygen b. water b. feed on several weed species
c. nitrogen d. light c. reproduce faster than the problem weed species
773. A method where one can still harvest profitable crops in spite of the d. a and c
presence of weeds 785. Mulching with organic materials is a desirable method of weed control
a. weed control b. weed prevention because it:
c. weed competition d. weed eradication a. inhibits weed growth b. softens the soil
774. A weed management approach that appears to be the most practical since c. conserves soil moisture d. a and c
it aims for desirable weed suppression is: 786. Cover cropping is a desirable weed control method in plantation tree crops
a. Prevention b. Eradication and the recommended leguminous plant species used for this purpose
c. Control d. None of the above includes:
775. This weed management approach is deemed ideal for it deals with both a. Calopogonium mucunoides b. Centrosema pubescens
present and future weed problems. c. Pueraria phaseoloides d. all of the above
a. Prevention b. Eradication 787. The birth of weed science as a discipline came about only after the
c. Control d. None of the above discovery of the herbicidal properties of :
776. Hand weeding could be classified as this type of weed control a. Pendimethalin b. 2,4-D
a. Physical b. Biological c. Bentazon d. Auxin
c. Chemical d. Cultural 788. The specific chemical for weed control:
777. Grassedge is an example of this method of weed control a. acaricide b. herbicide
a. Physical b. Biological c. insecticide d. molluscicide
c. Chemical d. Cultural 789. A pre-emergence herbicide for the control of broadleaves is:
778. The most primitive and oldest method of weed control is: a. butachlor b. atrazine
a. mechanical b. hand weeding c. propanil d. pendimethalin
c. flaming d. chemical 790. The component of the herbicide responsible for phytotoxic effect:
779. Hand weeding is: a. inert ingredient b. surfactant
a. effective against young weeds c. active ingredient d. protectant
b. favored due to availability and low cost of labor 791. Chemical sterilant is a volatile fumigant, which is intended to kill:
c. favored due to increasing cost of herbicide a. soil inhabiting insects b. weed seeds
d. all of the above c. fungi d. all of the above
792. It refers to the entire chain of events from the time the herbicide gets in a. DIMBOA b. azadirachtin c. protocatechuic acid d.
contact with the plant to its final effect, which could be the death of the plant. zearalenone
a. Mode of action b. volatilization 806. The following are entomopathogens except
c. Mechanism of action d. translocation a.Metarrhizium b.Trichogramma c.Beauveria d.
793. A part of a knapsack sprayer that transforms herbicide solution into fine Baculovirus
droplets is: 807. Also known as Compost Fungus Activator
a. tank b. nozzle a. Trichoderma b. Rhizopus c. Sclerotium
c. filter cap d. extension tube d.Gliocladium
794. A post-emergence herbicide is applied: 808. The following are beneficial arthropods except
a. after land preparation b. after crops and weeds have emerged a. dragonfly b. long-horned grasshopper
c. before land preparation d. all of the above c. short-horned grasshoppers d. lady beetle
795. In the scheme of herbicide classification, this herbicide is sprayed prior to 809. A fungus applied to breeding sites of Rhinoceros beetle inorder tomanage
planting. theirpopulation
a. Mode of action b. Toxicity a. Rhizoctonia b. Trichoderma c. Metarrhizium d.
c. Mobility of plant d. Timing of application Phytophthora
796. This control method requires host specificity in order to be effective: 810. Group of plants utilized in biofumigation to control bacterial wilt
a. Physical b. Biological ofvegetables caused by Ralstonia solanacearum due to the formation
c. Chemical d. Cultural ofisothiocyanates (ITCs) during decomposition
797. 2, 4-D is classified as: a. cucurbits b. crucifers c. cereals d.
a. Aliphatics b. Amides legumes
c. Phenoxy derivatives d. Nitrile derivatives 811. The name of commercially available Mycoherbicidea. Bioact b. Dipelc. De
798. The most popular herbicide which was discovered in 1944: Vine d. Biospark
a. paraquat b. atrazine 812. The interaction between two organisms where one party is benefitedwhile
c. 2,4-D d. glyphosate the other is adversely affected
799. The rate of application of powder herbicide containing 50% a.i. is 0.5 kg a. competition b. parasitism c. symbiosis d.
a.i./ ha, the weight of the formulated product needed/ ha is: mutualism
a. 250 g b. 500 g 813. The following are attributes of modern agriculture that aggravatespests
c. 750 g d. 1000 g except
800. The recommended rate of a liquid herbicide is 1.0 kg a.i./ ha, containing a. planting of resistant varieties b. conservation of natural enemies
20% a.i. If the volume of spray required is 400 L/ ha, and each tank load c. excessive use of pesticides d. continuous monoculture
contains 16 L, the amount of herbicide needed per tank load is: 814. Integrated pest management encourages the following except
a. 100 ml b. 200 ml a. maximization of chemical control methods
c. 300 ml d. 400 ml b. enhancement of natural enemies
c. combination of two or more compatible control measures
Approaches and Practices in Pest Management d. optimization of chemical control methods
801.A fungicide used as seed treatment against corn downy mildew 815. In the ecosystem plants are considered
a. metalaxyl b. benomyl c. difenoconazole d. Bordeaux mixture a. decomposers b. consumers c. scavengers d. producers
802. A phenolic compound present in pigmented onion varieties that 816. Man cannot live on earth without
inhibitspore germination ofColletotrichum circinans a. green plants b. oxygen c .money d. clothing
a. fusarin b. allicin c. catechol d. rotenone 817. A diseased plant is known as
803. All are examples of cultural control of pests except a. pathogen b. parasite c. saprophyte d.
a. thorough land preparation b. proper irrigation and drainage host/suscept
c. lunar planting d. hot water treatment 818. The overall plan to eliminate or alleviate a real or perceived pestproblem
804. An example of legal action employed in pest management a. pest management strategy b. pest management theory
a. prohibition and embargo b. vapor heat treatment c. pest control d. integrated control
c. wrapping of fruits with paper d. soil solarization 819. The book “Silent Spring” which revealed the unintentional
805. A chemical compound present in young corn plants which serves pesticidemovement and its effect on ecological system was published in
asprotectionagainst corn borer _______ byRachel Carson.
a. 1962 b. 1972 c. 1982 d. 1992 836. According to global estimate of Oerke et al, 1994, the highestpreharvest
820. Considered as the number one insect pest of corn losses of crops due to pests come from
a. corn aphids b. corn planthopper c. corn earworm d. corn a. pathogens b. weeds c. insects d. all answers are
borer correct
821. Weeds affect crop plants by 837. The estimated crop losses (pre harvest and post harvest) in eightmajor
a. parasitism b. infection c. competition d. food and cash crops
predation a. 52% b. 42% c. 10% d. all answers are
822. Pathogens that cause leaf spots affect plant tissues by correct
a. enzymes b. toxins c. polysaccharides d. blocking 838. The following are side effects of pesticides except
tissues a. destruction of beneficial species b. pesticide residue hazards
823. Insect pests with sucking mouthparts cause damage to plants by c. pest resurgence in treated areas d. use of HYVs
a. cutting plant tissues b. removing plant sap 839. Insects are considered as pest only when
c. making tunnels in the stem d. removing epidermis only a. it competes with man for some resources b. present in significant
824. A government agency that regulates movement of “would be pest” numbers
a. Bureau of Food and Drug b. Bureau of Plant Industry c. it damage crops and decrease crop yield d. all answers are correct
c. Fertilizer and Pesticide Authority d. Department of Agriculture 840. The following are considered basic to the development of sound
825. Refers to plants and plant products which are not allowed for transportdue pestmanagement strategies
to injurious pests and diseases a. biology of pest b. ecology of pest
a. restricted b. prohibited c. legislated d. regulated c. epidemiology of diseases d. all answers are correct
826. Known as the Plant Quarantine Law of the Philippines dated June 10,1978 841. Plant pest / disease can never be eliminated but only
a. PD 1433 b. PD 1143 c. RA 3767 d. RA 3027 a. managed b. controlled
827. In the sequential development of crop protection side effects ofpesticides c. both a and b are correct d. neither a nor b is correct
like pest shifting and resurgence started to appear during 842. Pests are serious in areas planted to only one cropa. true b. not truec.
a. disaster phase b. crisis phase maybe d. all answers are correct43. In mango, at least 80% of production cost
c. exploitation phase d. subsistence phase is devoted to pest control
828. Shift in pest control paradigm was observed during a. true b. not true c. maybe d. all answers are correct
a. subsistence phase b. exploitation phase 844. A mycoherbicide is an organism used to control weeds composed of
c. integrated control phase d. disaster phase a. fungi b. bacteria c. virus d. all answers are correct
829. Serious pest outbreaks was felt during 845. Rice varieties planted as stop gap of rice tungro
a. disaster phase b. crisis phase a. Masipag b. Matatag c. Pag- asa d. Biyaya
c. exploitation phase d. subsistence phase 846. Cavendish banana is susceptible to sigatoka (leaf spot) but we
830. The first hormone-based herbicide plantbecause of high export demand
a. 2,4-D b. glyphosate c. gramoxone d. machete a. true b. not really c. maybe d. all answers are correct
831. US President who issued a Presidential Decree which mandated theuse of 847. Diseases may kill insects and weeds
Pest Management whenever practical a. true b. not true c. maybe d. all answers are correct
a. George Bush b. Bill Clinton c. Jimmy Carter d. Barrack Obama 848. IPM simply means switching from chemical to organic pesticides
832. Pests which are always present but rarely cause damage a. true b. not true c. maybe d. all answers are correct
a. sub economic pests b. occasional pests 849. Most plants are ________ to plant pathogens.
c. perennial pests d. severe pests a. resistant b. susceptible c. immune d. tolerant
833. The most widely used bacterial genus as biological control 850. The toxic substance in a pesticide formulation
a. Pseudomonas b. Bacillus c. Ralstonia d. Erwinia a. active ingredient b. filler c. solvent d. inactive ingredient
834. An important insect pest of cotton 851. Refers to the control of pest by living organisms either by natural
a. bollworm b. budworm c. armyworm d. cutworm orartificialmeans
835. Ecological soundness in IPM refers to a. cultural control b. biological control
a. environmental quality b. protection against hazard to living c. physical control d. chemical control
organisms 852. The most toxic pesticide has this color band on its label
c. low pesticide residue level. d. all answers are correct a. blue b. red c. yellow d. green
853. Integrated pest management employs a variety of tactics and the c. resistant plants d. all answers are correct
leastmethod that could be used is 866. A type of resistance which is genetically controlled by the presence ofone,
a. cultural control b. chemical control a few, or many genes for resistance in the plant
c. biological control d. physical control a. pathogen-derived resistance b. induced resistance
854. Considered as the most effective and economical method of c. apparent resistance d. true resistance
pestmanagement 867. Also known as major gene resistance
a. cultural control b. biological control a. vertical resistance b. horizontal resistance
c. chemical control d. use of resistant varieties c. polygenic resistance d. non-specific resistance
855. Which of the following is not a pesticide formulation 868. Involves mass selection of seeds from most highly resistant
a. pellet b. bait c. vapor d. dust plantssurviving in the field where natural infection occurs
856. An organism with altered genetic make-up a. hybridization b. pedigree selection
a. transgenic b. biotechnology c. walking genes d. jumping c. recurrent selection d. seed selection
genes 869. The following are forms of microbial antagonism except
857. The relative amount of heritable qualities in plants that influence a. parasitism b. competition c. antibiosis d. antixenosis
theultimate degree of infection/infestation 870. Systemic fungicides that move in both directions like xylem/phloem are
a. host plant resistance b. host tolerance a. acropetal b. basipetal c. ambimobile d. all answers are
c. host immunity d. host susceptibility correct
858. A modern approach to minimize damage by pests with ultimate goal 871. All of the following refer to names of pesticides except
ofpopulation management rather than eradication a. trade name b. chemical name c. common name d. family name
a. Integrated Pesticide Management b. Integrated Pest Management 872. Benefits derived from biotechnology are
c. Insect Pest Management d. all answers are correct a. insect pest resistance b. disease resistance
859. Considered as secondary to chemicals in eradicating pathogensfrom soil c. herbicide resistance d. all answers are correct
a. fumigation b. heat treatment c. biological control d. soil 873. Pesticide degradation in the soil is accomplished by
solarization a. biological degradation b. chemical or photolytic action
860. Crop rotation, using resistant varieties, fallowing, use of cover cropsare c. adsorption on soil colloids d. all answers are correct
examples of 874. The following are quarantine diseases of banana except
a. physical control b. mechanical control a. bunchy top b. moko wilt c. panama wilt d. socorro wilt
c. cultural control d. biological control 875. These are symbols in pesticide labels which convey message withoutthe
861. The practice of leaving the farm unplanted for certain period thusdepriving use of words
the pests of their hosts which bring their population tosignificantly low level a. radiogram b. pictogram c. telegram d. all answers are
a. avoidance b. fallowing c. crop rotation d. correct
intercropping 876. Among the common side effects of pesticides are
862. The practice of east-west furrow orientation in cornfield will managethe a. pesticide resistance b. unintentional destruction of beneficial organisms
disease c. pest trading d. all answers are correct
a. downy mildew of corn b. banded leaf and sheath blight of corn 877. The strategy used to manage resistance failure which involves mixtureof
c. corn rust d. all answers are correct several lines with similar agronomic characteristics but each of differentgene for
863. Physical pest control method which eliminate fruit flies andanthracnose of resistance
mango and papaya for export to Japan a. multiline b. gene deployment
a. hot water treatment b. vapor heat treatment c. gene pyramiding d. gene stacking
c. refrigeration d. UV irradiation 878. Rice plants with Xa 21 gene confers resistance to
864. Refers to pest whose population equilibrium is always above theeconomic a. Xanthomonas oryzae pv. oryzae b.Pyricularia oryzae
threshold level c. Helminthosporium maydis d. Rhizoctonia solani
a. key pests b. occasional pests c. potential pests d. minor 879. A fungus that parasitizes eggs of plant parasitic nematodes
pests a. Trichogramma b. Trichoderma
865. The use of __________ is the ideal way to control pests if c. Paecilomyces d. Diadegma
satisfactorylevels of durable resistance can be incorporated into culturally 880. A fungus that infects Malayan rice bug
desirablecrop plants. a. Metarrhizium b. Trichoderma c. Paecilomyces d. all answers are
a. susceptible plants b. tolerant plants correct
881. Tomato plants with Sw-5 genes confer resistance to c. Nephotettix virescens d. Leptocorisa oratorius
a. Tomato Spotted Wilt Virus b.Ralstonia solanacearum 895. Two resistant Cavendish banana variants resistant to
c. Pectobacterium carotovora d. Tomato Yellow Leaf Curl Virus Fusariumwilt/Panama wilt caused by Fusarium oxysporum f.spcubense
882. A new mycoherbicide used to control Northern Jointvetch Tropicalrace 4.
a. Colletotrichum gloeosporioides a. GCTCV 119 and GCTCV 219 b. Grand Nain and Williams
b. Colletotrichum gloeosporioides c. Latundan and Cardaba d. Gros Michel and Williams
c. sp.aeschynomene 896. The following are important benefits of biotech crops except
d. Verticillium isolated all answers are correct a. biological diversity b. unprotected spraying of pesticide
8 83. Mechanism of biological control method that utilizes crucifers asrotation c. improved nutritional profile d. increased yield and income
crops 897. Planting biotech crops like Bt corn reduced CO2 emissions byelimination
a. biofumigation b. suppressive soil of pesticide sprays
c. antibiosis d. fungistasis a. true b. maybe c. not true d. not sure
884. This control method requires host specificity to be effective 898. Mango pulp weevil is an insect pest specific to mangoes
a. physical b. biological c. cultural d. chemical a. true b. maybe c. not true d. not sure
885. In the scheme of herbicide classification, this herbicide is sprayed priorto 899. A disease of banana which affected banana plantations in Davao delNorte
planting a. Panama wilt b. Moko wilt c. Sigatoka d. Bugtok
a. toxicity b. mode of action c. mobility in plant d. timing of 900. Identified as the new pest of rice grain in Region 12
application a. Leptocorisa oratorius b. Leptocorisa acuta
886. Weeds of similar growth habit as crops are often more seriouscompetitors c. Nephotethix virens d. Nilaparvata lugens
and thus given consideration 901. A fungal disease of corn which devastated thousands of hectares ofcorn
a. true b. not really c. definitely not true d. not sure field in Alamada, North Cotabato
887. The national IPM program dubbed as KASAKALIKASAN throughSpecial a. Banded Leaf and Sheath Blight b. Downy Mildew
Order No.126 dated May 3, 1993 was issued by c. Corn Rust d. Southern Leaf Blight
a. Joseph E. Estrada b. Corazon C. Aquino 902. A banana variety derived from Latundan and Saba which originatedin
c. Fidel V. Ramos d. Gloria M. Arroyo Thailand in 2007 with resistance to common banana diseases inthe Philippines
888. Curriculum in IPM trainings is usually a. Cavendish b. Mama Sita c. Señorita d. Cardaba
a. discovery-based b. experiential learning 903. In the plantation, Mango pulp weevil can be controlled by
c. participatory approach d. all answers are correct a. Sanitation b. Use of recommended
889. IPM trainings is conducted in insecticides
a. Students Field School b. Farmers Field School c. Open center pruning of mango trees d. all answers are correct
c. Schools without Walls d. all answers are correct 904. In order to ensure good yield, weed control activities should be done
890. An insect damage of rice stemborer a. after the critical period of the crop b. during the critical period of
a. dead heart b. whitehead c. hopperburn d. a and b are competition
correct c. throughout the cropping season d. after harvesting the crop
891. A pupal parasitoid ofBrontispa longissima 905. A weed which clogged rivers and caused flooding in Cotabato City in2011
a. Tetrastichus b. Trichogramma c. a and b are correct d. a. Monochoria vaginalis b. Eichhornia crassipes
Diadegma c. Pistia stratiotes d. Ipomea aquatic
892. Broken stalks and tassels borings at the base of ear shanks areindications 906. The following countries adopted IPM as policy during the 80’s except
of attack by a. Philippines b. Malaysia c. Indonesia d. Vietnam
a. corn borer b. corn earworm c. corn aphids d. corn semi- 907. Biological control of pests increase crop production within
looper existingresources
893. A mechanism of host plant resistance where the a. True b. Not True c. Not Sure d. all answers are
morphologicalcharacteristics of the plant influence the choice of the insect pest correct
withregards to source of food, shelter or oviposition sites 908. Development of pests resistant to pesticides has now become a
a. antixenosis b. antibiosis c. tolerance d. avoidance majorproblem in crop production
894. The spread of viruses in crops in the field is mostly due to insectvectors, a. True b. False c. Maybe d. all answers are
which of the following is not a vector? correct
a. Pentalonia nigronervosa b. Aphis craccivora
909. Resistant population of pests can be expected wherever single- c. Crop rotation d. Lunar planting
sitechemicals are used extensively for their control 923. One of these is a herbicide
a. True b. False c. Maybe d. All answers are a. Butachlor b. Monocrotophos c.Iprodione d. Carbamate
correct 924. Plant diseases account for the highest crop loss due to pests
910. Systemic pesticides which are specific in their action affect only oneor two a. true b. not true c. maybe d. uncertain
steps in a genetically controlled event in the metabolism of the pest,hence give 925. Cultivation and other farming operations alter the environment by
rise to resistant individuals in a population by single mutationor selection a. eliminating the weeds that harbor the pathogen
a. True b. False c. Maybe d. all answers are b. injuring plant roots creating infection caused by root pathogen
correct c. burying infected plant residues and decrease the amount of
911. The following are the most common mechanisms by which pestsdevelop availableinoculum
resistance to various pesticides except d. all answers are correct
a. decreased conversion to the real toxic compound 926. Beneficial microorganisms can accomplish the following except
b. increased affinity at the reactive site in the cell a. fix atmospheric nitrogen b. induce plant disease
c. detoxification of the chemical through modification of its structure c. decompose organic wastes d. suppress soilborne pathogens
d. bypassing a blocked reaction through a shift in metabolism 927. Which is not a beneficial microorganism
912. A bionematicide which provides natural and effective control of a. Yeast b. Photosynthetic bacteria
plantparasitic nematodes c. Lactic-acid bacteria d. Lady Beetle
a. Diagran b. Furadan c. Bioact d. Biocon 928. Used in alternative agriculture except
913. Paecilomyces lilacinus is a bionematicide that infects the eggs of a. recycling of farm wastes b. integration of crops and livestock
rootknot nematodes and greatly destroys the embryos in five days c. conservation tillage d. unprotected spraying
a. True b. False c. Maybe d. all answers are 929. Harmful microorganisms maybe involved in any of these except
correct a. stimulate soilborne pathogen b. inhibit seed germination
914. Paecilomyces lilacinus reduces/controls also other root rotting fungi c. inhibit plant growth d. stimulate plant growth
a. True b. False c. Maybe d. all answers are 930. The misuse of chemical pesticides adversely affected our environment
correct a. True b. Not really c. Not sure d. B and C
915. Beneficial arthropods and effective microorganisms are important 931. The legal basis for the regulation of genetically modified crops
insustainable agriculture a. A.O. 8 b. A.O. 20 c. A.O. 14 d. A.O. 16
a. True b. False c. Maybe d. all answers are 932. The following are examples of quarantinable pests except
correct a. mango pulp weevil b. rice black bug
916. The first record on the ill effects of pesticide residues was publishedin the c. corn borer d. oriental fruit fly
book “Silent Spring” by Rachel Carson 933. Another benefit of Bt corn is reduced toxin contamination arisingfrom
a. True b. False c. Maybe d. all answers are fungal attack on the damaged grain
correct a. True b. False c. Not sure d. Maybe
917. Trichoderma spp. is an example of antagonist 934. Which of the following statements is not true
a. True b. False c. Maybe d. all answers are a. weeds harbor insects and diseases
correct b. diseases may kill insects and weeds
918. Beneficial microorganisms are the principal agents used in naturefarming c. insects can be used to control other insects and weeds
a. True b. False c. Maybe d. all answers are d. all insects are pests
correct 935. You have a 16 liter knapsack sprayer and need to apply 15 loads
919. Weeds in the agroecosystem serve as ____________ of pests. ofinsecticide to a 0.75 hectare field. What is your spray volume in liters
a. breeding sites b. refuge c. alternate host d. all answers are perhectare
correct a. 300 b. 320 c. 325 d. 350
920. An active ingredient of rodenticide 936. Using a 16 liter knapsack sprayer, an insecticide will be sprayed at300
a.Cypermethrin b. Benomyl c. Zinc phosphide d. Carbofuran liters/0.25 hectare field. Calculate the number of sprayer loads needed
921. A specific fungicide forPhytophthora a. 5 b. 10 c. 8 d. 15
a. Iprodione b. Fosetyl-al c. Metalaxyl d. Benomyl 937. In a bioassay test, determine the amount of fungicide needed to dilute
922. Examples of cultural control of pests except 500ml water to attain the desired concentration of 300 ppm. The recommended
a. Irradiation b. Drying durable seeds before storage rate of fungicide Z is 2 tbsp/16 li water.
a. 0.3 g b. 0.15 g c. 0.03 g d. 30 g a. Granule b. Emulsifiable concentrate c. Wettable powder d. b and
938. Insecticide X (wettable powder) has a dilution rate to water of 1:200.What c
is the recommended dosage for 16 li water? 951. All are examples of cultural control of pests except
a. 50 g b. 60 g c. 80 g d. 40 g a. removal of bagworms b. site selection
939. Fungicide Y contains 300 g/kg a.i. of the formulated product, what isthe c. water management d. fertilizer management
percentage of its active ingredient? 952. Toxin produced by Metarhizium which kill insect pests
a. 0.3 % b. 30 % c. 35 % d. 50 % a. penicillin b. destruxin c. metarhin d. destrumin
940. If the rate of application of 30 % WP herbicide is 0.7 kg ai/ha, theweight of 953. The active principle in moringa which contain antipesticidal properties
formulated product needed per hectare is a. allicin b. capsicin c. pterygospermin d. jatropine
a. 2.33 kg b. 2.50 kg c. 3 kg d. 5 kg 954. Physic nut produces latex that contains alkaloid responsiblefor its
941. The recommended rate of a liquid herbicide containing 30 % ai is 1 liai/ha, nematicidal effect known as
if the volume of spray required is 200 li/ha, and each tank loadcontains 16 li, a. allicin b. capsicin c. pterygospermin d. jatropine
the amount of herbicide needed per tank load is 955. Examples of physical control of pests except
a. 166 ml b. 266 ml c. 366 ml d. 466 ml a. soil drenching of hot water b. soil fumigation
942. What is the amount of 50% WP herbicide needed per ha if the rate c. wrapping of fruits d. modified atmosphere storage
ofapplication is 2 kg ai/ha? 956. Considered as the number one world worst weed due to the
a. 3 kg b. 4 kg c. 0.04 kg d. 40 reportednumber of crops affected and difficulty in weed control
943. In a bioefficacy test, 700 ppm of Fungicide Y is needed. If thechemical a. cogon b. aguingay c. purple nutsedge d. lantana
has 50% ai, how much will be diluted to 500 ml water to attainthe desired 957. Other plants utilized in biofumigation to control soil borne pathogens
concentration? except
a. 35 g b. 3.5 g c. 0.35 g d. 0.035 g a. tagetes b. kamantigue c. kakawate d. rice
944. If 50 ml of herbicide Z (45% EC) will be diluted to 16 li of water, whatis the 958. Practices that control golden apple snail
strength of the solution? a. handpicking b. destroying egg mass
a. 0.5 % b. 5 % c. 3 % d. 0.14% c. herding ducks d. all answers are correct
945. If a molluscicide contains 300 g ai/kg of formulated product, what isthe 959. Practices that control rats
percentage of the active ingredient in the formulated product? a. use of blue torch b. use of bait
a. 60 %. b. 30 % c. 40 % d. 50 % c. rat campaign. d. all answers are correct
946. A farmer will spray an insecticide at 200 li/ha using a 16 li 960. Quarantine pests are controlled by inspection andcertification
knapsacksprayer. How many sprayer loads is needed? a. true b. not true c. uncertain d. not sure
a. 10 b. 12 c. 9 d. 11 961. Brown plant hoppers could be managed by cyper methrin insecticide
947. A systemic fungicide contains 200 g ai/kg of formulated product.Calculate a. true b. not true c. uncertain d. not sure
the concentration of the chemical in ppm 962. Practices to manage corn borer include
a. 500,000 ppm b. 400,000 ppm c. 300,000 ppm d. 200,000 ppm a. detasseling b. synchronous planting
Consider the following data in sprayer calibration: Distance travelled = c. use of Trichogramma d. all answers are correct
7mSprayer’s swath = 5mVolume sprayed = 5 li 963. Practices to manage rice tungro
948. What is the application rate in li/ha? a. planting resistant varieties b. synchronous planting
a. 1228 li b. 1628 li c. 1428 li d. 1328 li c. fallowing d. all answers are correct
949. Herbicide W contains 400 g ai/kg formulated product. What is 964. Specific fungicide to control sheath blight of rice
thepercentage of ai in the product. a. Benomyl b. Iprodione c. Mancozeb d. Chlorothalonil
a. 40 % b. 50 % c. 30 % d. 60 % 965. Basically, pesticides are considered important inputs in agricultural
Consider the following information: Insect pest to be controlled: Rice stem production
borerArea to be treated : 1.50 ha Labor cost : Php 200/man-day Type of a. true b. not true c. uncertain d. not sure
Formulation Granule Emulsifiable Concentrate Wettable Powder 966. The Philippines is known today for “ tsunami of pesticides”
Recommended Rate: 6.0kg/ha 1.0 L/ha 1.25 kg/ha Insecticide Cost: Php a. true b. not true c. uncertain d. not sure
500/kg Php 980 L/ha Php750/kg Required man-days for application/ha 333 967. Root knot disease of vegetables can be managed by inhibitoryplants like
Frequency of applicationEvery 2weeks Every 2weeks Every 2weeks a. jatropha b. panyawan c. kamantigue d. tagetes
950. Which of the formulations is cheap to use in the long run? 968. IPM allows for a paper means of controlling pest
a. true b. not true c. uncertain. d. not sure
169. Phytosanitary certificate and import permit can be usedinterchageably a. flooding b. mulching c. burning d. tillage
a. true b. not true c. uncertain d. not sure 988. Practitioners of pest control are referred to as exterminators
970. Physical and mechanical control can eliminate plant pathogens a. true b. not true c. uncertain d. not sure
a. true b. not true c. uncertain d. not sure 989. A new insect pest of Bt corn in the US
971. Golden kuhol could be utilized as a. corn earworm b. corn rootworm c. corn aphid d. corn
a. fertilizer b. food c. feed d. all answers are planthopper
correct 990. Considered as the first poisonous plant used as pest control
972. The wisdom of nature farming technology came from a. neem tree b. devil weed c. panyawan d. derris
a. Dr. Naruto b. Dr. Higa c. Dr. Cho d. Dr. Lee 991. The following are coverings used to control weeds
973. Japanese scientist who worked on effective microorganisms a. wood chips b. black plastic c. newspaper d. all answers are
a. Dr. Naruto b. Dr. Higa c. Dr. Cho d. Dr. Lee correct
974. The method of incorporating biological control agents in potatoseed pieces 992. The active ingredient of molluscicide
a.bSeed dip b. root dip c. Tuber dip d. all answers are a. Iprodione b. Methyl Bromide c. Zinc Phosphide d. Niclosamide
correct 993. Electromagnetic pest repelling devices can affect nervous system of
975. Beneficial microorganisms used in biological control are bestprepared by rodents
a. Fermentation b. putrefaction a. true b. not true c. uncertain d. not sure
c. Augmentation d. isolation 994. Insectary plants help increase the population of beneficial insects
976. A fungus isolated from flies a. true b. not true c. uncertain d. not sure
a. Trichoderma b. Metarhizium 995. The following are used for weed control
c. Beauveria d. Cordyceps a. vinegar b. organic approaches
977. An important component of mangosteen which possess antipesticidal c.Mucuna sp. d. all answers are correct
property 996. The following are general classifications of herbicides except
a. xanthone b. rotenone c. alpha terthienyl d. a. systemic poison b. soil borne poison
mangostenone c. contact poison d. stomach poison
978. The use of organic compost fertilizer and bio inoculants is said theclosest 997. Companion planting as pest management strategy is also known
alternative to natural farming asintercropping or mixed cropping
a. true b. not true c. uncertain d. not sure a. true b. not true c. uncertain d. not sure
979. Most plants that repel pests possess strong odor 998. The sterile insect technique whereby overwhelming numbers ofsterile
a. true b. not true c. uncertain d. not sure male insects are released is a form of
980. The best time to apply biological control agents a. insect resistance b. physical control
a. early morning b. late afternoon without rain c. biological control d. mechanical control
c. a & b are correct d. no answer is correct 999. Wood packaging materials for export of agricultural products arefumigated
981. The following are farming systems under organic agriculture except to control boring insects
a. sustainable farming b. ecological farming a. true b. not true c. uncertain d. not sure
c. modern farming d. traditional farming 1000. Pest control is at least as old as agriculture because of the need tokeep
982. Weeds also host pests and diseases that are spread tocultivated crops crops from pests
a. true b. not true c. uncertain d. not sure a. true b. not true c. uncertain d. not sure
983. Rodents can be controlled by
a. repellent b. bait c. trap d. all answers are correct ENTOMOLOGY
984. Mealy bugs in Cavendish banana for export can be removed bywashing 1. A 21. 41.B 61.A 81.C 101.A 121.A 141. 161 181. 201.C 221.A
with detergent before packing D C D C
a. true b. not true c. uncertain d. not sure 2. A 22.A 42.D 62.B 82.B 102.B 122.B 142. 162.A 182. 202.C 222.B
985. The most common method of controlling rat population C C
a. rat trap b. repellent c. poisoned bait d. all answers are correct 3.C 23. 43.B 63.B 83.A 103.A 123.A 143.B 163 183.B 203.C 223.C
986. Biological control eliminates pest with minimal harm to theecological D D
balance of the environment in its present form 4.A 24. 44.B 64. 84.A 104 124.C 144 164.B 184.A 204.A 224.B
a. true b. not true c. uncertain d. not sure C C D D
987. The oldest method of weed control 5.C 25.A 45.C 65.A 85.C 105.B 125.A 145. 165.A 185.B 205.A 225.C
 C 238. 263.A 288.A 313.A 338.B 363.B 388. 413.C 448 A 473.B 498 C 523.A
6.B 26. 46.A 66. 86.C 106.A 126.C 146.A 166.A 186.A 206 D D C
C C 239. 264.C 289.A 314.A 339.A 364.B 389. 414.A 449.A 474.B 499 B 524.C
7.A 27.B 47.C 67.B 87.B 107.B 127.C 147 167.A 187. 207.B C D
D C 240.B 265.D 290.A 315.B 340.B 365.B 390.A 415.B 450 B 475.B 500 D 525.C
8.B 28.A 48.C 68. 88.C 108 128.C 148 168.A 188.B 208.A 241. 266.A 291.C 316. 341.B 366.B 391.B 416.A 451.B 476. 501 A 526 D
C D D D D D
9.C 29. 49.D 69.B 89.D 109.A 129.B 149.A 169.A 189 209.B 242. 267.A 292.B 317.A 322.A 367.D 392.A 417.C 452 C 477.B 502 D 527.A
D D C
10.B 30. 50.D 70. 90.C 110.B 130.B 150.A 170.B 190 210.A 243. 268.A 293.B 318.A 343.D 368.D 393. 418.B 453 D 478.A 503.B
D C D C D
11.D 31.B 51.C 71.A 91.A 111 131 D 151.B 171 191 211 D 244. 269.A 294.B 319.A 344.C 369.C 394. 419.A 454 B 479.A 504 D
D D D D C
12.B 32. 52.A 72.A 92.B 112.A 132.B 152.B 172 192.B 212.A 245. 270.D 295.B 320.A 345.A 370.B 395.B 420.B 455 A 480. 505.B
C D D D
13.A 33. 53.B 73.A 93.A 113 133 D 153.B 173 193.B 213 D 246. 271.A 296.A 321.A 346.B 371.B 396.A 421.D 456.B 481. 506 D
C D D C C
14.C 34. 54.B 74. 94.B 114. 134.B 154.A 174.A 194.B 214 D 247. 272.A 297.C 322.B 347.B 372.D 397. 422.C 457 D 482.B 507D
C D C C D
15.A 35.A 55.A 75.B 95.A 115. 135.C 155 175.B 195.B 215.C 248. 273.D 298.B 323. 348.C 373.B 398.A 423.A 458 A 483.A 508 D
C D D D
16.A 36. 56.C 76.B 96.B 116.A 136.C 156.A 176.B 196.B 216.B 249.A 274.B 299.C 324.A 349.D 374.A 399. 424.A 459.A 484.B 509.A
C C
17.D 37.A 57.B 77.A 97.A 117. 137 D 157. 177.B 197.A 217.B 250.A 275.B 300.D 325.A 350.B 375.C 400. 425.D 460.C 485.A 510.A
C C D
18.A 38. 58.A 78.A 98.A 118. 138 D 158. 178.A 198.B 218.C 251. 276.A 301.C 326. 351.A 376.B 401.A 426.B 461 C 486. 511.A
C C C D D D
19.B 39. 59.A 79.B 99.C 119 139.C 159.B 179.B 199.B 219.B 252. 277.D 302.A 327. 352.C 377.A 402. 427.A 462.C 487.A 512 B
D D D C C
20.B 40.A 60.D 80.A 100.B 120.A 140.C 160.A 180 200.B 220.C 253. 278.D 303.D 328.A 353.B 378.D 403. 428.D 463 A 488. 513 A
D D C D
254.A 279.B 304.C 329.A 354.D 379.D 404. 429.A 464.C 489.B 514.A
Plant Pathology C
231. 256.B 281.D 306. 331.B 356.A 381. 406.A 441.C 466. 255.A 280.C 305.D 330.B 355.A 380.A 405.A 430.B 465 D 490.B 515.A
C D D C
232. 257.C 282.B 307. 332.B 357.C 382.B 407.B 442.C 467.B 431.B 432.A 433.C 434.B 435.B 436.C 437.B 438.A 439.C 400.B
D D
233.B 258.A 283.C 308. 333.C 358.C 383.B 408.C 443.A 468 B Weeds Science
D 528. 554.A 579.B 604 D 629.C 654 D 679.A 704.D 729.A 754.A 779 D
234. 259.D 284.B 309. 334.A 359.C 384.B 409.C 444.B 469 B C
D D 529 555.C 580.C 605.A 630.B 665 D 680.C 705.D 730.B 755 D 780D
235. 260.A 285.A 310. 335.D 360.A 385. 410.C 445.B 470. D
D D C D 530.A 556.C 581D 606.A 631.A 656.C 681.C 706.A 731 D 756.B 781.C
236. 261.A 286.A 311.B 336.A 361.A 386.A 411.C 446.A 471. 531 557 D 582D 607.A 632.C 657 D 682.B 707.D 732.B 757.B 782.A
D D D
237. 262.A 287.A 312.A 337.B 322.D 387.B 412.C 447 D 472. 532.A 558.B 583.A 608.B 633.A 658 D 683.A 708.C 733.B 758.B 783 D
D C 533.A 559 D 584 B 609.A 634 D 659.C 684 D 709.A 734.B 759.A 784 D
534. 560.A 585.C 610.B 635.B 660.B 685.A 710.C 735 D 760.C 815.D 835.D 855.C 875.B 895.A 915.A 935.B 955.B 975.A 995.D
C 816.A 836.C 856.A 876.D 896.B 916.A 936.A 956.C 976.D 996.D
536 561.B 586.B 611.C 636 D 661.B 686.A 711.B 736.C 761.C 817.D 837.A 857.A 877.A 897.A 917.A 937.B 957.D 977.A 997.A
D 818.A 838.D 858.B 878.A 898.A 918.A 938.C 958.D 978.A 998.C
537. 562.C 587.B 612.C 637.C 662.B 687 D 712.A 737.C 762.C
C
819.A 839.D 859.C 879.C 899.A 919.D 939.B 959.D 979.A 999.A
538 563.C 588.C 613.B 638.A 663.A 688.C 713.A 738.C 763.A
D
539.A 564.C 589 D 614.C 639.A 664.B 689.C 714.C 739.A 764 D 820.D 840.D 860.C 880.A 900.B 920.C 940.A 960.A 980.C 1000.A
540 565 D 590.B 615.C 640.C 665.A 690.B 715.A 740.B 765 A
D
541 566.A 591.C 616 D 641 D 666.B 691.C 716.A 741 D 766.B
D
542 567.B 592.B 617 D 642.C 667 D 692.A 717.C 742.B 767 D
D
543.B 568.B 593.C 618 D 643.C 668.A 693.B 718.C 743.B 768 D
544.A 569 D 594.B 619.C 644 D 669.A 694.C 719.B 744.B 769.B
545.B 570.B 595 C 620.B 645.C 670.C 695.B 720.B 745 D 770 D
546.B 571D 596 D 621.A 646.B 671 D 696 D 721.D 746.C 771.C
547. 572.B 597.B 622.B 647 D 672.B 697.C 722.D 747.C 772.B
C
548. 573.B 598.A 623.A 648.B 673.B 698.A 723.D 748 D 773.A
C
549. 574.A 599.B 624 D 649.C 674 B 699.A 724.B 749.A 774.C
C
550.A 575.B 600 D 625 D 650.B 675 D 700 D 725.B 750.B 775.C
551.B 576 D 601.A 626.B 651 D 676 D 701.C 726.A 751.A 776.A
552. 577 D 602 D 627.B 652 D 677 B 702.A 727.C 752.B 777.C
C
553.B 578.A 603.C 528.B 653.B 678 D 703.B 728.D 753.C 778.B

Approaches and Practices in Pest Management

801.A 821.C 841.A 861.B 881.A 901.A 921.B 941.B 961.B 981.C
802.C 822.B 842.A 862.B 882.B 902.B 922.A 942.B 962.D 982.A
803.D 823.B 843.A 863.B 883.A 903.D 923.A 943.C 963.D 983.D
804.A 824.B 844.A 864.A 884.B 904.B 924.B 944.D 964.B 984.A
805.A 825.B 845.B 865.C 885.D 905.B 925.D 945.B 965.A 985.C
806.B 826.A 846.A 866.D 886.A 906.D 926.B 946.B 966.A 986.A
807.A 827.B 847.A 867.A 887.C 907.A 927.D 947.D 967.D 987.D
808.C 828.C 848.B 868.D 888.D 908.A 928.D 948.C 968.A 988.A
809.C 829.A 849.A 869.D 889.D 909.A 929.D 949.A 969.B 989.B
810.B 830.A 850.A 870.C 890.D 910.A 930.A 950.C 970.B 990.D
811.C 831.C 851.B 871.D 891.A 911.B 931.A 951.A 971.D 991.D
812.B 832.B 852.B 872.D 892.A 912.C 932.C 952.B 972.C 992.D
813.B 833.B 853.B 873.D 893.A 913.A 933.A 953.C 973.B 993.A
814.A 834.A 854.D 874.D 894.D 914.A 934.D 954.D 974.C 994.A